332354 + Interview Questions in Secondary School in Math

1.	27 , 4 , 917 , 6 , 731, 3 , ?
Answer» Answer: 8 Step-by-step EXPLANATION: I HOPE this will HELP you

1.

27 , 4 , 917 , 6 , 731, 3 , ?

Answer»

Answer:

8

Step-by-step EXPLANATION:

I HOPE this will HELP you

Discussion

2.	Why some students are faced with problems in life such as failing grades
Answer» ANSWER: Because they didn't do STUDY PROPERLY

2.

Why some students are faced with problems in life such as failing grades

Answer»

ANSWER:

Because they didn't do STUDY PROPERLY

Discussion

3.	Find 4 digit number in which first digit is one fouth of the last digit, the second digit is six times the first digit, and the third digit is second digit plus 3.
Answer» Answer: Means the first DIGIT number is one-fourth of the fourth digit. So, the first digit number can be 1 and 2. Also GIVEN that, SECOND digit is six times the first digit. THEREFORE, by looking at the second digit we can say that the first digit number is 1

3.

Find 4 digit number in which first digit is one fouth of the last digit, the second digit is six times the first digit, and the third digit is second digit plus 3.

Answer»

Answer:

Means the first DIGIT number is one-fourth of the fourth digit. So, the first digit number can be 1 and 2. Also GIVEN that, SECOND digit is six times the first digit. THEREFORE, by looking at the second digit we can say that the first digit number is 1

Discussion

4.	Which is an equation of the line with slope -3 and a y-intercept of 5
Answer» ANSWER: y= -3x+5 is the EQUATION of LINE.

4.

Which is an equation of the line with slope -3 and a y-intercept of 5

Answer»

ANSWER:

y= -3x+5 is the EQUATION of LINE.

Discussion

5.	What is the equation of the line passing through the points (1,3); (-1,3); (3,3); (-3,3) ?
Answer» ANSWER: -1,3 Step-by-step EXPLANATION: PERIMETER and the city COUNCIL have been WORKING .

5.

What is the equation of the line passing through the points (1,3); (-1,3); (3,3); (-3,3) ?

Answer»

ANSWER:

-1,3

Step-by-step EXPLANATION:

PERIMETER and the city COUNCIL have been WORKING .

Discussion

6.	What is the resiprocal of the rational number
Answer» Step-by-step explanation: 1 and-1 are the only RATIONAL numbers which are their own RECIPROCAL. No other rational number is its own reciprocal. we know that there is no rational number which when multiplied with 0 gives 1. therefore rational number zero has no reciprocal or multiplicative INVERSE

6.

What is the resiprocal of the rational number

Answer»

Step-by-step explanation:

1 and-1 are the only RATIONAL numbers which are their own RECIPROCAL. No other rational number is its own reciprocal. we know that there is no rational number which when multiplied with 0 gives 1. therefore rational number zero has no reciprocal or multiplicative INVERSE

Discussion

7.	FIND THE SQUARE OF 4x-7
Answer» ANSWER: ${(4x - 7)}^{2} \\ {16x}^{2} + 49 - 56x \\$ Step-by-step EXPLANATION: here is UR answer

7.

FIND THE SQUARE OF 4x-7

Answer»

ANSWER:

${(4x - 7)}^{2} \\ {16x}^{2} + 49 - 56x \\$

Step-by-step EXPLANATION:

here is UR answer

Discussion

8.	I am a number 55 and 60 . I have only 2 factors . my digits are 4 apart . what am I ?
Answer» ANSWER: You are a Number Step-by-step EXPLANATION: i.e.,55 and 60 lucky, aka-hacker,

8.

I am a number 55 and 60 . I have only 2 factors . my digits are 4 apart . what am I ?

Answer»

ANSWER:

You are a Number

Step-by-step EXPLANATION:

i.e.,55 and 60

lucky,

aka-hacker,

Discussion

9.	27+38= +37= Fill in the blank
Answer» 27+38 = ___+37 65 = ___+37 65-37 = ___ = 28 Hope this HELPS.

9.

27+38= +37= Fill in the blank

Answer»

27+38 = ___+37

65 = ___+37

65-37 = ___

= 28

Hope this HELPS.

Discussion

10.	The value of cos 2a/(1 - sin 2a) is01tan atan(45° + a)
Answer» ANSWER: COT( A - B) = ( COTA cotB+1)/(cotB-cotA) Now, LHS = cot( 45 - A) = = ( CotAcot45° + 1)/( cotA - cot45) = ( CotA +1)/( cotA - 1) = ( CosA/sinA +1)/( cosA/sinA - 1) = (CosA+sinA)?/(cosA+sinA)(COSA-sinA) = (cos?A+sin A+2sinAcosA)/(cos A-sin? A) = (1 + 2sinAcosA) / cos2A = (1 + sin2A ) /cos2A I hope this helps you:) if found HELPFUL mark it as brainiliest and follow plz

10.

The value of cos 2a/(1 - sin 2a) is01tan atan(45° + a)

Answer»

ANSWER:

COT( A - B)

= ( COTA cotB+1)/(cotB-cotA)

Now,

LHS = cot( 45 - A) =

= ( CotAcot45° + 1)/( cotA - cot45)

= ( CotA +1)/( cotA - 1)

= ( CosA/sinA +1)/( cosA/sinA - 1)

= (CosA+sinA)?/(cosA+sinA)(COSA-sinA)

= (cos?A+sin A+2sinAcosA)/(cos A-sin? A)

= (1 + 2sinAcosA) / cos2A

= (1 + sin2A ) /cos2A

I hope this helps you:)

if found HELPFUL mark it as brainiliest and follow plz

Discussion

11.	The value of sin x + sin 3x + sin 5x + sin 7x isAlready given 15k points. Want more ??
Answer» TAN45 = 1 ꀍꂦᖘꏂ‌ ꓄ꀍꀤꌚ ꀍꏂ꒒ᖘꌚ ꌩꂦꀎ ☺︎︎☺︎︎

11.

The value of sin x + sin 3x + sin 5x + sin 7x isAlready given 15k points. Want more ??

Answer»

TAN45 = 1

ꀍꂦᖘꏂ‌ ꓄ꀍꀤꌚ ꀍꏂ꒒ᖘꌚ ꌩꂦꀎ ☺︎︎☺︎︎

Discussion

12.	019 On simplifying the expression :2+2divide2+2 x 2 + 2-2. we get(1) 1(4) 21217(3) 3
Answer» Answer: 7 Step-by-step explanation: 2+2÷2+2×2+2-2 = 2+1+2×2+2-2 = 2+1+4+2-2 = 9-2 = 7

12.

019 On simplifying the expression :2+2divide2+2 x 2 + 2-2. we get(1) 1(4) 21217(3) 3

Answer»

Answer:

7

Step-by-step explanation:

2+2÷2+2×2+2-2

= 2+1+2×2+2-2

= 2+1+4+2-2

= 9-2

= 7

Discussion

13.	8339 is exactly divisible by 13 then find
Answer» Answer: 8339=3237 and it is DIVISIBLE by 13 Step-by-step EXPLANATION:* REMINDER will be 249

13.

8339 is exactly divisible by 13 then find

Answer»

Answer:

83*39=3237

and it is DIVISIBLE by 13

Step-by-step EXPLANATION:

REMINDER will be 249

Discussion

14.	solve and illustrate the following mathematical equations through pictures 7+7=n 20+15=n 4x5=n 25-17=n
Answer» ANSWER: cccgxvbdvdvdhhdbebcuebhdudhdb Step-by-step EXPLANATION: babdbbdvdhdhrhhhdhrbbrbrbrbrbrbfbrbbdbdbdhddhhdd

14.

solve and illustrate the following mathematical equations through pictures 7+7=n 20+15=n 4x5=n 25-17=n

Answer»

ANSWER:

cccgxvbdvdvdhhdbebcuebhdudhdb

Step-by-step EXPLANATION:

babdbbdvdhdhrhhhdhrbbrbrbrbrbrbfbrbbdbdbdhddhhdd

Discussion

15.	Hlep me solve this problem
Answer» ANSWER: no I can't because I don't KNOW.

15.

Hlep me solve this problem

Answer»

ANSWER:

no I can't because I don't KNOW.

Discussion

16.	11. In an election, candidate A has secured 12% votes more than candidate B. By how much per centhas candidate B less than candidate A?
Answer» Answer: 12 % LESS is the RIGHT answer please MARK as BRAINLIEST

16.

11. In an election, candidate A has secured 12% votes more than candidate B. By how much per centhas candidate B less than candidate A?

Answer»

Answer:

12 % LESS is the RIGHT answer

please MARK as BRAINLIEST

Discussion

17.	a rectangular vessel of dimensions 20cm by 15cm by 11cm is full of water. if the water is poured into an empty cylindrical vessel of radius 10cm find find height of the cylindrical vessel
Answer» Answer : The height of the cylindrical vessel is 10.5cm Given : length is 20cm BREADTH is 15cm height is 11cm To FIND : Height of the cylindrical vessel Solution : FIRST of all Now we need to find the volume of rectangular vessel volume of rectangular vessel (CUBOID) = length × breadth × height ● 20 × 15 × 11 ● 3300cm³ Volume of WATER in cylindrical vessel is 3300cm³ Now we have to find the volume of cylindrical: As we know that volume of cylindrical = πr²h ● 22/7 × 10 × 10 × h = 3300cm³ ● 2200/7 × h = 3300cm³ ● h = 3300/1 × 7/2200 ● h = 1.5 × 7 ● h = 10.5 cm Hence , The height of the cylindrical vessel is 10.5cm

17.

a rectangular vessel of dimensions 20cm by 15cm by 11cm is full of water. if the water is poured into an empty cylindrical vessel of radius 10cm find find height of the cylindrical vessel

Answer»

Answer :

The height of the cylindrical vessel is 10.5cm

Given :

length is 20cm
BREADTH is 15cm
height is 11cm

To FIND :

Height of the cylindrical vessel

Solution :

FIRST of all Now we need to find the volume of rectangular vessel

volume of rectangular vessel (CUBOID) = length × breadth × height

● 20 × 15 × 11

● 3300cm³

Volume of WATER in cylindrical vessel is 3300cm³

Now we have to find the volume of cylindrical:

As we know that

volume of cylindrical = πr²h

● 22/7 × 10 × 10 × h = 3300cm³

● 2200/7 × h = 3300cm³

● h = 3300/1 × 7/2200

● h = 1.5 × 7

● h = 10.5 cm

Hence , The height of the cylindrical vessel is 10.5cm

Discussion

18.	Find the ratio of the following:(a) 15 minutes to 1.5 hours(b) 25 cm to 2.5 m
Answer» Answer: (a) 1.5 hrs =90 minutes ratio 15 :90 1 : 6 (b) 2.5m = 250 cm ratio 25 : 250 1 : 10 please MARK as BRAINLIEST

18.

Find the ratio of the following:(a) 15 minutes to 1.5 hours(b) 25 cm to 2.5 m

Answer»

Answer:

(a) 1.5 hrs =90 minutes

ratio

15 :90

1 : 6

(b) 2.5m = 250 cm

ratio

25 : 250

1 : 10

please MARK as BRAINLIEST

Discussion

19.	If x/y=13/6,then find the value of (3x+5y)/(3x-5y)
Answer» Answer: 23/3 Step-by-step explanation: TAKE 5Y common and SUBSTITUTE x/y in the EXPRESSION

19.

If x/y=13/6,then find the value of (3x+5y)/(3x-5y)

Answer»

Answer:

23/3

Step-by-step explanation:

TAKE 5Y common and SUBSTITUTE x/y in the EXPRESSION

Discussion

20.	7+6=10 प्लस 6 बराबर कितना होगा
Answer» Step-by-step EXPLANATION: LET 6=x then 7+ X=10 X=10-7 X= 3 6=X=3 6=3

20.

7+6=10 प्लस 6 बराबर कितना होगा

Answer»

Step-by-step EXPLANATION:

LET

6=x

then

7+ X=10

X=10-7

X= 3

6=X=3

6=3

Discussion

21.	Vidyalekhansta &Total surface area of cylinder=%cm.h=14 cm
Answer» ANSWER:ok Step-by-step EXPLANATION:

21.

Vidyalekhansta &Total surface area of cylinder=%cm.h=14 cm

Answer»

ANSWER:ok

Step-by-step EXPLANATION:

Discussion

22.	Find laplace transform of 5sin2t-3cos2t
Answer» Advantages of VEGETATIVE propagation Quicker and more certain. Produces identical quality as the parent. Plants that do not have viable SEED, can be reproduced. Flowers produced are of SUPERIOR quality. Desirable character of FRUIT can be maintained.

22.

Find laplace transform of 5sin2t-3cos2t

Answer»

Advantages of VEGETATIVE propagation

Quicker and more certain.

Produces identical quality as the parent.

Plants that do not have viable SEED, can be reproduced.

Flowers produced are of SUPERIOR quality.

Desirable character of FRUIT can be maintained.

Discussion

23.	One number is 6 less than the other. If the difference bettween of their squares is 72, find the numbers.
Answer» Answer: the numbers are 9 and 3 Step-by-step explanation: let the numbers be X and x - 6 given x² - (x - 6)² = 72 => x² - (x² + 36 - 12X) = 72 => x² - x² - 36 + 12x = 72 => 12x = 72 + 36 => 12x = 108 => x = 9 therefore the numbers are 9 and 3

23.

One number is 6 less than the other. If the difference bettween of their squares is 72, find the numbers.

Answer»

Answer:

the numbers are 9 and 3

Step-by-step explanation:

let the numbers be X and x - 6

given x² - (x - 6)² = 72

=> x² - (x² + 36 - 12X) = 72

=> x² - x² - 36 + 12x = 72

=> 12x = 72 + 36

=> 12x = 108

=> x = 9

therefore the numbers are 9 and 3

Discussion

24.	29. The length, breadth and height of a room are 8 cm, 5 cm and 7 cm respectively. Find the cost ofwhite washing the walls and the ceiling of the room at the rate of 0.50 per cm.
Answer» ANSWER: Answer CUBIOD - L×B×C = 280

24.

29. The length, breadth and height of a room are 8 cm, 5 cm and 7 cm respectively. Find the cost ofwhite washing the walls and the ceiling of the room at the rate of 0.50 per cm.

Answer»

ANSWER:

Answer CUBIOD - L×B×C = 280

Discussion

25.	The population of a town increases 10% every3 years. If the present population of the town is72,600, calculate :(i) its population after 6 years;
Answer» Step-by-step explanation: 72600* 10/100 = 7260 population after 3 YEARS 72600 + 7260 = 79860 79860*10/100 = 7986 population after 6 years 79860 + 7986 = 87846

25.

The population of a town increases 10% every3 years. If the present population of the town is72,600, calculate :(i) its population after 6 years;

Answer»

Step-by-step explanation:

72600* 10/100 = 7260

population after 3 YEARS 72600 + 7260 = 79860

79860*10/100 = 7986

population after 6 years 79860 + 7986 = 87846

Discussion

26.	Solve it⤵tan(65-θ) - cot(25+θ) = tan{90-(25+θ)} Also tell value of tan{90-(25+θ)}
Answer» Therefore, this should be CALCULATED by = { As we KNOW, Tan θ = Cot ( 90 - θ ) , so :- }We get, Tan [ 90 - ( 65 + θ ) ] - Cot ( 25 - θ ) Cot [ 25 - θ ] - Cot ( 25 - θ)= 0. Hope..this ANSWER may help you..plz..mark it as BRAINLIST....

26.

Solve it⤵tan(65-θ) - cot(25+θ) = tan{90-(25+θ)} Also tell value of tan{90-(25+θ)}

Answer»

Therefore, this should be CALCULATED by = { As we KNOW, Tan θ = Cot ( 90 - θ ) , so :- }We get, Tan [ 90 - ( 65 + θ ) ] - Cot ( 25 - θ ) Cot [ 25 - θ ] - Cot ( 25 - θ)= 0.

Hope..this ANSWER may help you..plz..mark it as BRAINLIST....

Discussion

27.	Del^n[x]^n=n!h^n and Del^n+1Del[x]^n
Answer» Answlike Step-by-step EXPLANATION:

27.

Del^n[x]^n=n!h^n and Del^n+1Del[x]^n

Answer»

Answlike

Step-by-step EXPLANATION:

Discussion

28.	Xh - V its output is equal toSelect one:O a. None of thesenO b. I, I, F, FO c.T,T,F,TO d. I,II,Ipage
Answer» Step-by-step explanation: Xh - V its OUTPUT is equal to Select one: O a. None of these n O B. I, I, F, F O c.T,T,F,T O d. I,II,I page

28.

Xh - V its output is equal toSelect one:O a. None of thesenO b. I, I, F, FO c.T,T,F,TO d. I,II,Ipage

Answer»

Step-by-step explanation:

Xh - V its OUTPUT is equal to

Select one:

O a. None of these

n

O B. I, I, F, F

O c.T,T,F,T

O d. I,II,I

page

Discussion

29.	For n=195, by Fermat's theorem an-2a) d (modn)b) 1(modn)c) 0(modn)d) a(modn)
Answer» YEP this is CORRECT THANK my ANSWER PLS

Discussion

30.	Who answers this question they will be blessed orelse.. U rnt blessed
Answer» ANSWER: I DONT REMEMBER Step-by-step EXPLANATION:

30.

Who answers this question they will be blessed orelse.. U rnt blessed

Answer»

ANSWER:

I DONT REMEMBER

Step-by-step EXPLANATION:

Discussion

31.	The class width of class interval 60 to 70 is
Answer» 65 is ur ANSWER ! CLASS width of class Interval = 60 + 70÷ 2 = 65! hope this will help you alot and follow me guys!

31.

The class width of class interval 60 to 70 is

Answer»

65 is ur ANSWER !

CLASS width of class Interval = 60 + 70÷ 2

= 65!

hope this will help you alot and follow me guys!

Discussion

32.	A truck is moving at an average speed of 45 km/h. Find the time it takes to cover 108km. Express your answer in minutes.
Answer» Step-by-step EXPLANATION: T= D/S =108 KM/45 km. hr =2.4 hr =2.4 *60 =144 MIN

32.

A truck is moving at an average speed of 45 km/h. Find the time it takes to cover 108km. Express your answer in minutes.

Answer»

Step-by-step EXPLANATION:

T= D/S

=108 KM/45 km. hr

=2.4 hr

=2.4 *60

=144 MIN

Discussion

33.	Plz solve the above attached fig . maths ❤️❤️
Answer» ${ \large{ \underline{ \underline{ \rightarrow{ \mathsf{solution}}}}}}$ ${ \large{ \underline{ \underline{ \rightarrow{ \mathtt{given}}}}}}$ ${ \mathsf{ \rightarrow{if \: \frac{ \cos {}^{4 \: } \alpha \: }{ \cos{}^{4} \: \: \beta } + \frac{ \sin {}^{4} \alpha }{ \sin {}^{2} \beta } = 1 \: }}} \\ { \mathsf{prove \: that}}$ ${ \tiny{ \mathsf{ \rightarrow{ \frac{ \cos {}^{4} \alpha }{ \cos {}^{2} \beta } = 1 - \frac{ \sin {}^{1} \alpha }{ \sin {}^{2} \beta } = \frac{ \sin {}^{2} \beta - \sin {}^{4} \alpha }{ \sin {}^{2} \beta } }}}}$ ${ \tiny{ \mathsf{ \rightarrow{ \frac{ \cos {}^{4} \alpha }{ \cos {}^{2} \beta } \: = \frac{ \sin {}^{2} \beta \: = \: \sin {}^{4} \alpha }{ \sin {}^{2} \beta } }}}}$ ${ \tiny{ \mathsf{ \rightarrow{ \ \cos {}^{4} \alpha \sin {}^{2} \beta = ( \sin {}^{2} \beta \sin {}^{4} \alpha ) \cos {}^{2} \beta }}}}$ ${ \tiny{ \mathsf{ \rightarrow{(1 - \sin {}^{2} \alpha ) \sin {}^{2} \beta = (\sin {}^{2} \beta - \sin {}^{4} \alpha) (1 - \sin {}^{2} \beta )}}}}$ ${ \tiny{ \mathsf{ \rightarrow{(1 + \sin {}^{4} \alpha = - 2 \sin {}^{2} \alpha) \sin {}^{2} \beta = \sin {}^{2} \beta - \sin {}^{4} \alpha - \sin {}^{4} \beta + \sin {}^{4} \sin {}^{2} \beta }}}}$ ${ \tiny{ \mathsf{ \rightarrow{ \sin {}^{2} \beta + \sin {}^{4} \alpha \sin {}^{2} \beta - \sin {}^{2} \beta \sin {}^{2} \alpha \sin {}^{2} \beta }}}}$ ${ \tiny{ \mathsf{ = \sin {}^{2} \beta - \sin {}^{4} \alpha - \sin {}^{4} \beta + \sin {}^{4} \alpha \sin {}^{2} \beta }}}$ ${ \tiny{ \boxed{ \mathsf{ \rightarrow{ \sin {}^{4} \alpha + \sin {}^{4} \beta = 2 \sin {}^{2} \alpha \sin {}^{2} \beta }}}}}$ (i) (II) REFER Attachment Hope it HELPS U!!

33.

Plz solve the above attached fig . maths ❤️❤️

Answer»

${ \large{ \underline{ \underline{ \rightarrow{ \mathsf{solution}}}}}}$

${ \large{ \underline{ \underline{ \rightarrow{ \mathtt{given}}}}}}$

${ \mathsf{ \rightarrow{if \: \frac{ \cos {}^{4 \: } \alpha \: }{ \cos{}^{4} \: \: \beta } + \frac{ \sin {}^{4} \alpha }{ \sin {}^{2} \beta } = 1 \: }}} \\ { \mathsf{prove \: that}}$

${ \tiny{ \mathsf{ \rightarrow{ \frac{ \cos {}^{4} \alpha }{ \cos {}^{2} \beta } = 1 - \frac{ \sin {}^{1} \alpha }{ \sin {}^{2} \beta } = \frac{ \sin {}^{2} \beta - \sin {}^{4} \alpha }{ \sin {}^{2} \beta } }}}}$

${ \tiny{ \mathsf{ \rightarrow{ \frac{ \cos {}^{4} \alpha }{ \cos {}^{2} \beta } \: = \frac{ \sin {}^{2} \beta \: = \: \sin {}^{4} \alpha }{ \sin {}^{2} \beta } }}}}$

${ \tiny{ \mathsf{ \rightarrow{ \ \cos {}^{4} \alpha \sin {}^{2} \beta = ( \sin {}^{2} \beta \sin {}^{4} \alpha ) \cos {}^{2} \beta }}}}$

${ \tiny{ \mathsf{ \rightarrow{(1 - \sin {}^{2} \alpha ) \sin {}^{2} \beta = (\sin {}^{2} \beta - \sin {}^{4} \alpha) (1 - \sin {}^{2} \beta )}}}}$

${ \tiny{ \mathsf{ \rightarrow{(1 + \sin {}^{4} \alpha = - 2 \sin {}^{2} \alpha) \sin {}^{2} \beta = \sin {}^{2} \beta - \sin {}^{4} \alpha - \sin {}^{4} \beta + \sin {}^{4} \sin {}^{2} \beta }}}}$

${ \tiny{ \mathsf{ \rightarrow{ \sin {}^{2} \beta + \sin {}^{4} \alpha \sin {}^{2} \beta - \sin {}^{2} \beta \sin {}^{2} \alpha \sin {}^{2} \beta }}}}$

${ \tiny{ \mathsf{ = \sin {}^{2} \beta - \sin {}^{4} \alpha - \sin {}^{4} \beta + \sin {}^{4} \alpha \sin {}^{2} \beta }}}$

${ \tiny{ \boxed{ \mathsf{ \rightarrow{ \sin {}^{4} \alpha + \sin {}^{4} \beta = 2 \sin {}^{2} \alpha \sin {}^{2} \beta }}}}}$

(i) (II)

REFER Attachment

Hope it HELPS U!!

Discussion

34.	Two trains, in which one train is 50 meters longerthan another, are running in opposite directions andcrosses each other in 10 seconds. If they run in thesame direction, the fast moving train crosses thesecond train in 1 minute & 30 seconds. If the speedof the fast moving train is 90 kmph, then what is thelength of each train?
Answer» Let the LENGTH of trains be X m and (x + 50)m and the speed of other TRAIN be y m per sec. The speed of the FIRST train = 90 km per hr. = 90 × 5 = 25 m per sec. 18 Case : I Opposite direction, Their relative speed = (y + 25)m per sec. Distance covered = x + x + 50 = 2x + 50 metres ∴ TIME taken = 2x + 50 = 10 y + 25 ⇒ 2x + 50 = 10y + 250 ...(i) Case II. Direction is Same Their relative speed = (25 – y) m per sec. Distance covered = x + x + 50 = 2x + 50m ∴ Time taken = 2x + 50 = 90 25 − y ⇒ 2x + 50 = 90 (25 – y) ...(ii) From equations (i) and (ii) 10y + 250 = 2250 – 90y ⇒ 10y + 90y = 2250 – 250 ⇒ y = 2000 = 20 100 Putting y = 20 in equation (i), we have 2x + 50= 10 × 20 + 250 = 450 ⇒ 2x = 450 – 50 = 400 ⇒ x = 400 = 200 2 ∴ x + 50 = 200 + 50 = 250 metres. Hence, The length of the 1st train = 200 metres. The length of the 2nd train = 250 metres. The speed of the 2nd train = 20 m per sec.

34.

Two trains, in which one train is 50 meters longerthan another, are running in opposite directions andcrosses each other in 10 seconds. If they run in thesame direction, the fast moving train crosses thesecond train in 1 minute & 30 seconds. If the speedof the fast moving train is 90 kmph, then what is thelength of each train?

Answer»

Let the LENGTH of trains be X m and (x + 50)m and the speed of other TRAIN be y m per sec.

The speed of the FIRST train = 90 km per hr.

= 90 ×

5

= 25 m per sec.

18

Case : I Opposite direction,

Their relative speed = (y + 25)m per sec.

Distance covered = x + x + 50 = 2x + 50 metres

∴ TIME taken =

2x + 50

= 10

y + 25

⇒ 2x + 50 = 10y + 250 ...(i)

Case II. Direction is Same

Their relative speed = (25 – y) m per sec.

Distance covered = x + x + 50 = 2x + 50m

∴ Time taken =

2x + 50

= 90

25 − y

⇒ 2x + 50 = 90 (25 – y) ...(ii)

From equations (i) and (ii)

10y + 250 = 2250 – 90y

⇒ 10y + 90y = 2250 – 250

⇒ y =

2000

= 20

100

Putting y = 20 in equation (i), we have

2x + 50= 10 × 20 + 250 = 450

⇒ 2x = 450 – 50 = 400

⇒ x =

400

= 200

2

∴ x + 50 = 200 + 50 = 250 metres.

Hence,

The length of the 1st train = 200 metres.

The length of the 2nd train = 250 metres.

The speed of the 2nd train = 20 m per sec.

Discussion

35.	Solve the simultaneous equation 3y - 2x=9 , 2x + 5y=15
Answer» Step-by-step explanation: 3 y-2x = 9 2 X + 5 y= 5 so now y =9+2x/3 putting the value of y in EQUATION 2 we get 2X + 5(9+2x)/3=5 2x+(45+10x)/3=5 2x+45+10x=15 12x=-30 x=-30/12 x=-2.5

35.

Solve the simultaneous equation 3y - 2x=9 , 2x + 5y=15

Answer»

Step-by-step explanation:

3 y-2x = 9

2 X + 5 y= 5

so now

y =9+2x/3

putting the value of y in EQUATION 2 we get

2X + 5(9+2x)/3=5

2x+(45+10x)/3=5

2x+45+10x=15

12x=-30

x=-30/12

x=-2.5

Discussion

36.	(2x^3 - 12x^2+16x)÷ (x-2)(x-4)
Answer» Answer: 5fy7fy7gu8nimby7byvfggr6hunik

36.

(2x^3 - 12x^2+16x)÷ (x-2)(x-4)

Answer»

Answer:

5fy7fy7gu8nimby7byvfggr6hunik

Discussion

37.	In the diagram r is the radius of each circle and area of square not covered by circle is 378cm2 what is the value of r
Answer» ANSWER: nahi ATA MUJHE KAISA mazak kiya

37.

In the diagram r is the radius of each circle and area of square not covered by circle is 378cm2 what is the value of r

Answer»

ANSWER:

nahi ATA MUJHE KAISA mazak kiya

Discussion

38.	JX(ii) Find the value of discriminant of the quadratic equation 5m2 — m = 0.
Answer» ANSWER: a=5m,b=2,c=m Step-by-step EXPLANATION: MARK me as a BRAINALIST

38.

JX(ii) Find the value of discriminant of the quadratic equation 5m2 — m = 0.

Answer»

ANSWER:

a=5m,b=2,c=m

Step-by-step EXPLANATION:

MARK me as a BRAINALIST

Discussion

39.	Hey guys can you help me with this question ??
Answer» Step-by-step explanation: OOO what a question if U FIND answer then tell me ALSO

39.

Hey guys can you help me with this question ??

Answer»

Step-by-step explanation:

OOO what a question if U FIND answer then tell me ALSO

Discussion

40.	5634×672= what is answer solve + show
Answer» Answer: 3,786,048 HOPE IT HELPS ☺️

40.

5634×672= what is answer solve + show

Answer»

Answer:

3,786,048

HOPE IT HELPS ☺️

Discussion

41.	18 A watch is sold for 3 1080 at a loss of 10%. Find the cost price of the watch (in rupees).(1) 2000(2) 1500(3) 12001700
Answer» Answer: SELLING PRICE (SP) = RS. 1080 Loss percentage = 10% COST Price (CP) = ? $\underline{\bigstar\:\textsf{According to the given Question :}}$ $:\implies\sf SP=CP \times (100-Loss)\%\\\\\\:\implies\sf 1080=CP \times (100-10)\%\\\\\\:\implies\sf 1080 = CP \times 90\%\\\\\\:\implies\sf 1080 = CP \times \dfrac{90}{100}\\\\\\:\implies\sf 1080 \times \dfrac{100}{90} = CP\\\\\\:\implies\sf 12 \times 100 = CP\\\\\\:\implies\sf CP = Rs.\:1200$ ⠀ $\therefore\:\underline{\textsf{Hence, Cost Price of watch is (3) \textbf{Rs. 1200}}}.$ $\rule{200}{1}$ $\boxed{\begin{minipage}{6.5 cm}\underline{\text{Some Important Formulae Related to it :}}\\ \\ SP=CP\times(100+\sf Profit)\%\\ \\SP=CP\times(100-Loss)\%\\ \\Profit\%=\dfrac{Profit}{CP}\times100 \\ \\Loss\%=\dfrac{Loss}{CP}\times100\end{minipage}}$

41.

18 A watch is sold for 3 1080 at a loss of 10%. Find the cost price of the watch (in rupees).(1) 2000(2) 1500(3) 12001700

Answer»

Answer:

SELLING PRICE (SP) = RS. 1080
Loss percentage = 10%
COST Price (CP) = ?

$\underline{\bigstar\:\textsf{According to the given Question :}}$

$:\implies\sf SP=CP \times (100-Loss)\%\\\\\\:\implies\sf 1080=CP \times (100-10)\%\\\\\\:\implies\sf 1080 = CP \times 90\%\\\\\\:\implies\sf 1080 = CP \times \dfrac{90}{100}\\\\\\:\implies\sf 1080 \times \dfrac{100}{90} = CP\\\\\\:\implies\sf 12 \times 100 = CP\\\\\\:\implies\sf CP = Rs.\:1200$

⠀

$\therefore\:\underline{\textsf{Hence, Cost Price of watch is (3) \textbf{Rs. 1200}}}.$

$\rule{200}{1}$

$\boxed{\begin{minipage}{6.5 cm}\underline{\text{Some Important Formulae Related to it :}}\\ \\ SP=CP\times(100+\sf Profit)\%\\ \\SP=CP\times(100-Loss)\%\\ \\Profit\%=\dfrac{Profit}{CP}\times100 \\ \\Loss\%=\dfrac{Loss}{CP}\times100\end{minipage}}$

Discussion

42.	Find the sum of n terms of the series 1/12+1/23+1/3*4+....
Answer» Step-by-step explanation: Welcome to Gboard clipboard, any TEXT you COPY will be SAVED here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.

42.

Find the sum of n terms of the series 1/12+1/23+1/3*4+....

Answer»

Step-by-step explanation:

Welcome to Gboard clipboard, any TEXT you COPY will be SAVED here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.Welcome to Gboard clipboard, any text you copy will be saved here.

Discussion

43.	Find six rational no between 3&4find six rational no between 3&4by using this formula(x+d) (x+d) 2 (x+d) 3 (x+d) 4(x+d) 5 (x+d)*6d= y+x/2my answer is in attachmentplease check it out and tell whether it is correct or not by using this formulahelp my guys if u tried doing this share ur answer with menew method taught by my teacher I didn't found in any net resourcehelp me at least in this pleasespamers stay awayI will report for sure
Answer» Answer: your answer is wrong. we do multiplication first and after that we do addition. solve it again by the METHOD MENTIONED above. please mark me as BRAINLIEST.

43.

Find six rational no between 3&4find six rational no between 3&4by using this formula(x+d) (x+d) 2 (x+d) 3 (x+d) 4(x+d) 5 (x+d)*6d= y+x/2my answer is in attachmentplease check it out and tell whether it is correct or not by using this formulahelp my guys if u tried doing this share ur answer with menew method taught by my teacher I didn't found in any net resourcehelp me at least in this pleasespamers stay awayI will report for sure

Answer»

Answer:

your answer is wrong.

we do multiplication first and after that we do addition.

solve it again by the METHOD MENTIONED above.

please mark me as BRAINLIEST.

Discussion

44.	5 square 4 multiply 5 square 3
Answer» Answer: 78125 Step-by-step explanation: *5^45^3 5^45^3=625125 625125=78125* answered by, LUCKY, Sudo-Hacker,

44.

5 square 4 multiply 5 square 3

Answer»

Answer:

78125

Step-by-step explanation:

5^4*5^3

5^4*5^3=625*125

625*125=78125

answered by,

LUCKY,

Sudo-Hacker,

Discussion

45.	(b) The diagonals of a rectangle are perpendicular to each other. Foke
Answer» ANSWER: no.The DIAGONALS of a RECTANGLE are not PERPENDICULAR

45.

(b) The diagonals of a rectangle are perpendicular to each other. Foke

Answer»

ANSWER:

no.The DIAGONALS of a RECTANGLE are not PERPENDICULAR

Discussion

46.	If the angles of a triangle are in the ratio 3 : 4 : 5 then the smallest angle is30 degree45 degree60 degree75 degree
Answer» If the ANGLES of a triangle are in the RATIO 3 : 4 : 5 then the smallest angle is 45 degree. Step by step Let say angle are 3x, 4x & 5x. 3x + 5x + 4x = 180° 12x = 180° x = 15° Smallest angle = 3x = 45°

46.

If the angles of a triangle are in the ratio 3 : 4 : 5 then the smallest angle is30 degree45 degree60 degree75 degree

Answer»

If the ANGLES of a triangle are in the RATIO 3 : 4 : 5 then the smallest angle is 45 degree.

Step by step

Let say angle are 3x, 4x & 5x.

3x + 5x + 4x = 180°

12x = 180°

x = 15°

Smallest angle = 3x = 45°

Discussion

47.	Find the perimeter of a rect. box whose length is 23 cm & breadth is 12 cm
Answer» Step-by-step EXPLANATION: PERIMETER = 2(L+B) 2(23+12) 235 70

47.

Find the perimeter of a rect. box whose length is 23 cm & breadth is 12 cm

Answer»

Step-by-step EXPLANATION:

PERIMETER = 2(L+B)

2*(23+12)

2*35

70

Discussion

48.	Find the value of P if 7+9 by 8+15 is equal to 2÷3
Answer» ANSWER: Don't KNOW Step-by-step EXPLANATION: Have a NICE DAY Have a nice day

48.

Find the value of P if 7+9 by 8+15 is equal to 2÷3

Answer»

ANSWER:

Don't KNOW

Step-by-step EXPLANATION:

Have a NICE DAY

Have a nice day

Discussion

49.	3a.16a'b*c24a 'b'c-4
Answer» Step-by-step EXPLANATION: I can't UNDERSTAND what you MEAN

49.

3a.16a'b*c24a 'b'c-4

Answer»

Step-by-step EXPLANATION:

I can't UNDERSTAND what you MEAN

Discussion

50.	Draw different quadrilaterals ABCD (Quadrilateral, Rectangle, Trapezium etc.) using a ruler. Mark the mid-points of sides. Join them and make new quadrilateral and name it PORS. what kind of quadrilaterals are formed? represent the data in the form of table illustrating original and newlyformed quadrilaterals."
Answer» ANSWER: REPRESENT the DATA in the FORM of table

50.

Draw different quadrilaterals ABCD (Quadrilateral, Rectangle, Trapezium etc.) using a ruler. Mark the mid-points of sides. Join them and make new quadrilateral and name it PORS. what kind of quadrilaterals are formed? represent the data in the form of table illustrating original and newlyformed quadrilaterals."

Answer»

ANSWER:

REPRESENT the DATA in the FORM of table

Discussion

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