332354 + Interview Questions in Secondary School in Math

1.	Shalu took a loan of ₹12800 at 9% per anum rate of interest for 6 months . Find the intrest paid and the total amountpaid by her after 6 months
Answer» ANSWER: interest=576₹ amount=13376₹

1.

Shalu took a loan of ₹12800 at 9% per anum rate of interest for 6 months . Find the intrest paid and the total amountpaid by her after 6 months

Answer»

ANSWER:

interest=576₹

amount=13376₹

Discussion

2.	How to do this from exponents and power
Answer» ANSWER: it is very EASY no yahhar

2.

How to do this from exponents and power

Answer»

ANSWER:

it is

very EASY

no yahhar

Discussion

3.	Lenght and breadth of rectangle is 12.3and 9.6 find its perimeter
Answer» Answer: 43.8 is the PERIMETER of RECTANGLE

3.

Lenght and breadth of rectangle is 12.3and 9.6 find its perimeter

Answer»

Answer:

43.8 is the PERIMETER of RECTANGLE

Discussion

4.	17 less than four times a number is 11. Find the numbTf 10 be added to four times a certain number, the resFind the number.2 of a number is 20 less than the original number. Fi3A number is 25 more than its - th part. Find the numnumber is as much greater than\|21\|as is less thandymore than one-fourth of a number is two-fifths of thOne-third of a number exceeds one-fourth of the num11:16 Anthe
Answer» Step-by-step EXPLANATION: tdktdktwktwktllhwlyxltdlhdpjf

4.

17 less than four times a number is 11. Find the numbTf 10 be added to four times a certain number, the resFind the number.2 of a number is 20 less than the original number. Fi3A number is 25 more than its - th part. Find the numnumber is as much greater than|21|as is less thandymore than one-fourth of a number is two-fifths of thOne-third of a number exceeds one-fourth of the num11:16 Anthe

Answer»

Step-by-step EXPLANATION:

tdktdktwktwktllhwlyxltdlhdpjf

Discussion

5.	if two zeros of the polynomial P of x is equal to x cube + 2 x square - 9 x minus 18 3 and minus 3 find other zeros of the polynomial P of x
Answer» -2 Step-by-step explanation: 3 and -3 are two zeros of the polynomial p(x) = $x^{3}$ + 2 $x^{2}$ –9x – 18 So, (x – 3) (x+3) = $x^{2}$ – 9 is a factor p(x) To FIND another factor, let’s use ling division method (Note Check division in attachment) Thus, the other factor is x + 2 Hence the other ZERO is -2. To learn more i)Obtain all zeros of the polynomial f x is equal to X 4 - 3 x cube minus x SQUARE + 9 x minus 6 . If two of its zeros are minus under root 3 and under 3 brainly.in/question/3571224 ii)If two ZEROES of the polynomial p(x) =x3 +2x2-9x-18 are 3 and -3 find other zero of the polynomial brainly.in/question/15441641

5.

if two zeros of the polynomial P of x is equal to x cube + 2 x square - 9 x minus 18 3 and minus 3 find other zeros of the polynomial P of x

Answer»

-2

Step-by-step explanation:

3 and -3 are two zeros of the polynomial p(x) = $x^{3}$ + 2 $x^{2}$ –9x – 18

So, (x – 3) (x+3) = $x^{2}$ – 9 is a factor p(x)

To FIND another factor, let’s use ling division method

(Note Check division in attachment)

Thus, the other factor is x + 2

Hence the other ZERO is -2.

To learn more

i)Obtain all zeros of the polynomial f x is equal to X 4 - 3 x cube minus x SQUARE + 9 x minus 6 . If two of its zeros are minus under root 3 and under 3

brainly.in/question/3571224

ii)If two ZEROES of the polynomial p(x) =x3 +2x2-9x-18 are 3 and -3 find other zero of the polynomial

brainly.in/question/15441641

Discussion

6.	Trigonomety Prove that 64Sin^6 A - 96Sin⁴A + 36Sin²A= 4
Answer» ANSWER: it is PROVED in TRIGONOMETRY

6.

Trigonomety Prove that 64Sin^6 A - 96Sin⁴A + 36Sin²A= 4

Answer»

ANSWER:

it is PROVED in TRIGONOMETRY

Discussion

7.	Find the circumference of a circle of radius 7.2cm
Answer» Step-by-step EXPLANATION: Circumference of *CIRCLE* =2×pi×r =2×3.14×7.2 =2×22.608 =45.216cm

7.

Find the circumference of a circle of radius 7.2cm

Answer»

Step-by-step EXPLANATION:

Circumference of CIRCLE =2×pi×r

=2×3.14×7.2

=2×22.608

=45.216cm

Discussion

8.	Write the rational number64/-20 in standard form
Answer» ANSWER: HOPE this HELPS you Step-by-step explanation: 64/-20 32/-10 16/-5 -16/5

8.

Write the rational number64/-20 in standard form

Answer»

ANSWER:

HOPE this HELPS you

Step-by-step explanation:

64/-20

32/-10

16/-5

-16/5

Discussion

9.	The ratio a:b and b:a are equal only if
Answer» ANSWER: The RATIO a:B and b:a are EQUAL only if a=b, b=a

9.

The ratio a:b and b:a are equal only if

Answer»

ANSWER:

The RATIO a:B and b:a are EQUAL only if a=b, b=a

Discussion

10.	Factorise 22 + 2 + 1 upon 4
Answer» ANSWER: 25/4 is the RIGHT answer

10.

Factorise 22 + 2 + 1 upon 4

Answer»

ANSWER:

25/4 is the RIGHT answer

Discussion

11.	Please answer the above question......
Answer» ANSWER: Use SIN(a+b) and solve it values are given others u can FIND using triangle law and solve it. Then TAKE sin on other SIDE u will get the value.

11.

Please answer the above question......

Answer»

ANSWER:

Use SIN(a+b) and solve it values are given others u can FIND using triangle law and solve it.

Then TAKE sin on other SIDE u will get the value.

Discussion

12.	Find the area of trapezium whose parallel sides are5 and 9cm and distance between them is 4cm
Answer» Answer: Step-by-step explanation: area of trapezium=1/2h(a+b) i.e =1/24(5+9) =214=28cm2 hope u UNDERSTOOD the answer ...plz MARK me as brainliest.... NEW to brainly...plz SUPPORT

12.

Find the area of trapezium whose parallel sides are5 and 9cm and distance between them is 4cm

Answer»

Answer:

Step-by-step explanation:

area of trapezium=1/2h(a+b)

i.e =1/2*4(5+9)

=2*14=28cm2

hope u UNDERSTOOD the answer ...plz MARK me as brainliest....

NEW to brainly...plz SUPPORT

Discussion

13.	On Sundays Rani has her lunch at 1:30 and finishes her lunch in 30 minutes. At what time does she finish her lunch?
Answer» ANSWER: she FINISHES her LUNCH at 2 'o CLOCK

13.

On Sundays Rani has her lunch at 1:30 and finishes her lunch in 30 minutes. At what time does she finish her lunch?

Answer»

ANSWER:

she FINISHES her LUNCH at 2 'o CLOCK

Discussion

14.	Anexamination, so students arest failed. What peoof Students falled?sed. Of them 24 passed and thewhat percentages of Students passed?nts passed? What percentages"
Answer» Answer: please upload PROPER QUESTION... can't UNDERSTAND your question

14.

Anexamination, so students arest failed. What peoof Students falled?sed. Of them 24 passed and thewhat percentages of Students passed?nts passed? What percentages"

Answer»

Answer:

please upload PROPER QUESTION... can't UNDERSTAND your question

Discussion

15.	when object is placed at 12 centimetre in front of concave mirror whose focus is 8 find the image distance ?
Answer» Answer: -24 CM Step-by-step explanation: u=-12, V=?, f=-8 1/f=1/v+1/u (by mirrors FORMULA) 1/-8=1/v+1/-12 1/12-1/8=1/v 2-3/24=1/v -1/24=1/v v=-24 cm

15.

when object is placed at 12 centimetre in front of concave mirror whose focus is 8 find the image distance ?

Answer»

Answer:

-24 CM

Step-by-step explanation:

u=-12, V=?, f=-8

1/f=1/v+1/u (by mirrors FORMULA)

1/-8=1/v+1/-12

1/12-1/8=1/v

2-3/24=1/v

-1/24=1/v

v=-24 cm

Discussion

16.	ACCORDING TO THE GENERAL EQUATION FOR CONDITIONAL PROBABILITY , if p(A∩B) = 3/10 and p(B) = 2/5 what is P(AlB)
Answer» The conditional probability is $P(A\|<klux>B</klux>)=\frac{3}{4}$ Step-by-step EXPLANATION: Given that $P(A\bigcap B)=\frac{3}{10}$ and $P(B)=\frac{2}{5}$ To find the conditional probability $P(A\|B)$ : Conditional probabiltiy- P(A\|B) means "Event A given Event B" In other WORDS, event B has ALREADY HAPPENED, now what is the chance of event A. The conditional probability formula is $P(A\|B)=\frac{P(A\bigcap B)}{P(B)}$ Now substitute the values of the probabilities we get $P(A\|B)=\frac{\frac{3}{10}}{\frac{2}{5}}$ $=\frac{3}{10}\times \frac{5}{2}$ $=\frac{3}{2}\times \frac{1}{2}$ $=\frac{3}{4}$ Therefore the conditional probability is $P(A\|B)=\frac{3}{4}$

16.

ACCORDING TO THE GENERAL EQUATION FOR CONDITIONAL PROBABILITY , if p(A∩B) = 3/10 and p(B) = 2/5 what is P(AlB)

Answer»

The conditional probability is $P(A|<klux>B</klux>)=\frac{3}{4}$

Step-by-step EXPLANATION:

Given that $P(A\bigcap B)=\frac{3}{10}$ and $P(B)=\frac{2}{5}$

To find the conditional probability $P(A|B)$ :

Conditional probabiltiy- P(A|B) means "Event A given Event B" In other WORDS, event B has ALREADY HAPPENED, now what is the chance of event A.

The conditional probability formula is

$P(A|B)=\frac{P(A\bigcap B)}{P(B)}$

Now substitute the values of the probabilities we get
$P(A|B)=\frac{\frac{3}{10}}{\frac{2}{5}}$
$=\frac{3}{10}\times \frac{5}{2}$
$=\frac{3}{2}\times \frac{1}{2}$
$=\frac{3}{4}$

Therefore the conditional probability is $P(A|B)=\frac{3}{4}$

Discussion

17.	The cost of tiling a wall 8 m by 4 m is rs 7400. what is the cost per square metre
Answer»

Discussion

18.	If diagonal of a square is 3 cm then find it area.
Answer» Answer: 4.5 is the answer of this question Formula: DIAGONAL of SQUARE=√2×side kar ke side nikalo phir area of square=(side)2 karo Aa JAYEGA Hope it helps you

18.

If diagonal of a square is 3 cm then find it area.

Answer»

Answer:

4.5 is the answer of this question

Formula:

DIAGONAL of SQUARE=√2×side kar ke side nikalo phir

area of square=(side)2 karo Aa JAYEGA

Hope it helps you

Discussion

19.	Tutorial - 1The demand D and the price p of a commodity are related by 100D + 2p = 440.Express i))the demand function, ii)total revenue function in terms of D.Find p(2) and R(3
Answer» GIVEN : demand D and the price p of a commodity are related by 100D + 2p = 440. To find : i) the demand function, ii)total REVENUE function in TERMS of D. Step-by-step explanation: D - Demand P - price of commodity 100D + 2p = 400 => 100D = 400 - 2p => D = (400 - 2p)/100 => D = 4 - p/50 Demand fucntion D = 4 - p/50 Total Revenue = Demand * Price => Total Revenue = (4 - p/50)p => Total Revenue = 4p - p²/50 => R = 4p - p²/50 100D + 2p = 400 => 50D + p = 200 => p = 50(4 - D) Total Revenue = D 50(40 - D) = 50 (40D - D²) = 2000D - 50D² R = 2000D - 100D² in terms of D Learn more: A MONOPOLIST's demand function is p = 300 - 5x, answer the ... brainly.in/question/13472423 A monopolist's demand function is p = 300 - 5x, answer the ... brainly.in/question/13501380

19.

Tutorial - 1The demand D and the price p of a commodity are related by 100D + 2p = 440.Express i))the demand function, ii)total revenue function in terms of D.Find p(2) and R(3

Answer»

GIVEN : demand D and the price p of a commodity are related by 100D + 2p = 440.

To find : i) the demand function, ii)total REVENUE function in TERMS of D.

Step-by-step explanation:

D - Demand

P - price of commodity

100D + 2p = 400

=> 100D = 400 - 2p

=> D = (400 - 2p)/100

=> D = 4 - p/50

Demand fucntion D = 4 - p/50

Total Revenue = Demand * Price

=> Total Revenue = (4 - p/50)p

=> Total Revenue = 4p - p²/50

=> R = 4p - p²/50

100D + 2p = 400 => 50D + p = 200 => p = 50(4 - D)

Total Revenue = D 50(40 - D)

= 50 (40D - D²)

= 2000D - 50D²

R = 2000D - 100D² in terms of D

Learn more:

A MONOPOLIST's demand function is p = 300 - 5x, answer the ...

brainly.in/question/13472423

A monopolist's demand function is p = 300 - 5x, answer the ...

brainly.in/question/13501380

Discussion

20.	Which one of the following is an equation?a. x 3b. x + 3c. q +(5 2) s 15d.x - 2 = 0
Answer» The ANSWER of this QUESTION is the OPTION d

20.

Which one of the following is an equation?a. x 3b. x + 3c. q +(5 2) s 15d.x - 2 = 0

Answer»

The ANSWER of this QUESTION is the OPTION d

Discussion

21.	John is 48 years old age 7 years less than 5 times message find marrys age
Answer» Answer: Marie's age = 'x' John's age = 48 = 5*(x) - 7 => 55= 5X => x=11 Thus Marie's age is 11 years

21.

John is 48 years old age 7 years less than 5 times message find marrys age

Answer»

Answer:

Marie's age = 'x'

John's age = 48 = 5*(x) - 7

=> 55= 5X

=> x=11

Thus Marie's age is 11 years

Discussion

22.	A trader sells on jacket for rupees 660 at a profit of 20%,the purchase price is?
Answer» ANSWER: LET CP be 100 profit= 20%of 100 20÷100×100 profit=20

22.

A trader sells on jacket for rupees 660 at a profit of 20%,the purchase price is?

Answer»

ANSWER:

LET CP be 100

profit= 20%of 100

20÷100×100

profit=20

Discussion

23.	Please say reason also with explanation
Answer» Answer: option A : 5CM Step-by-step explanation: TANGENTS of a CIRCLE from an exterior point are equal thus AB=AC Thus AC=8cm also DB=DP=PE=CE=3cm thus AC=AE+CE 8=AE+3 thus AE is 5cm

23.

Please say reason also with explanation

Answer»

Answer:

option A : 5CM

Step-by-step explanation:

TANGENTS of a CIRCLE from an exterior point are equal

thus AB=AC

Thus AC=8cm

also DB=DP=PE=CE=3cm

thus AC=AE+CE

8=AE+3

thus AE is 5cm

Discussion

24.	Find the perimeter of the square whose area is 2500
Answer» ANSWER: here is your answer ➡️ ➡️➡️ 200 m Area of SQ.= side^2 2500=side ^2 √2500= side 50 m= side *perimeter of sq. = 4side =450* perimeter=200 m Step-by-step explanation: MARK it as a brainliest answer

24.

Find the perimeter of the square whose area is 2500

Answer»

ANSWER:

here is your answer ➡️ ➡️➡️ 200 m

Area of SQ.= side^2

2500=side ^2

√2500= side

50 m= side

perimeter of sq. = 4*side

=4*50

perimeter=200 m

Step-by-step explanation:

MARK it as a brainliest answer

Discussion

25.	Find the perimeter of the figure ABCD.
Answer» 63.28 is the ANSWER of this QUESTION

Discussion

26.	Find value of log8 9 ÷48.5using log table
Answer» Answer: 0.263648268 ☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺

26.

Find value of log8 9 ÷48.5using log table

Answer»

Answer:

0.263648268

☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺

Discussion

27.	The needle is an example of
Answer» Answer: A THIN, sharp piece of metal with an eye on the end that THREAD GOES through and that is used for SEWING is an example of a NEEDLE. ... A thin, sharp piece of metal used in knitting is an example of a needle. A thin, metal pointer on a compass is an example of a needle.

27.

The needle is an example of

Answer»

Answer:

A THIN, sharp piece of metal with an eye on the end that THREAD GOES through and that is used for SEWING is an example of a NEEDLE. ... A thin, sharp piece of metal used in knitting is an example of a needle. A thin, metal pointer on a compass is an example of a needle.

Discussion

28.	Two complementary angles differ by 24° find the angles
Answer» Step-by-step EXPLANATION: X+Y=90 DEGREES. X=Y+24 (Y+24)+Y=90 2Y=90-24 2Y=66 Y=66/2 Y=33 DEGREES FOR THE SMALLER ANGLE X=33+24=57 DEGREES FOR THE LARGER ANGLE. PROOF: 33+57=90 90=90

28.

Two complementary angles differ by 24° find the angles

Answer»

Step-by-step EXPLANATION:

X+Y=90 DEGREES.

X=Y+24

(Y+24)+Y=90

2Y=90-24

2Y=66

Y=66/2

Y=33 DEGREES FOR THE SMALLER ANGLE

X=33+24=57 DEGREES FOR THE LARGER ANGLE.

PROOF:

33+57=90

90=90

Discussion

29.	find the area of the triangle formed by joining the middle point of the sides of the triangle whose vertices are (0,-1) (2,1) and (0,3)
Answer» Answer: it is 20 because u should use the FORMULA AREA of TRIANGLES......,!

29.

find the area of the triangle formed by joining the middle point of the sides of the triangle whose vertices are (0,-1) (2,1) and (0,3)

Answer»

Answer:

it is 20 because u should use the FORMULA AREA of TRIANGLES......,!

Discussion

30.	5 hour's before 6pm
Answer» ANSWER: Answer is this ... But I REALLY don't UNDERSTAND Step-by-step EXPLANATION:

30.

5 hour's before 6pm

Answer»

ANSWER:

Answer is this ... But I REALLY don't UNDERSTAND

Step-by-step EXPLANATION:

Discussion

31.	Mohan walks 12km in 15/4 hours. how much distance will he cover in 4hours
Answer» Answer:64/5 Step-by-step explanation: 15/4 HOUR= 12km 1 HR= 16/5 4 HR= 16/5*4

31.

Mohan walks 12km in 15/4 hours. how much distance will he cover in 4hours

Answer»

Answer:64/5

Step-by-step explanation:

15/4 HOUR= 12km

1 HR= 16/5

4 HR= 16/5*4

Discussion

32.	Out of an Income of Rs150000. Shalu spends Rs102000. What percent of her income does she save?
Answer» Answer: 32% Step-by-step explanation: 48000/150000×100=32% HOPE this will HELP you

32.

Out of an Income of Rs150000. Shalu spends Rs102000. What percent of her income does she save?

Answer»

Answer:

32%

Step-by-step explanation:

48000/150000×100=32%

HOPE this will HELP you

Discussion

33.	One of the acute angles of an obtuse angled triangle is one-third of the second one.If the obtuse angle of the triangle is 120 degree,find the sizes of the two acute angles of the triangle.
Answer» The TWO acute angles of the triangle are 15° and 45° respectively. Step-by-step EXPLANATION: Let, FIRST acute angle of triangle = α then second acute angle is = 3α (GIVEN) And obtuse angle = 120° (Given) As, we know that the sum of the three angles of a triangle is 180° . ∴ α + 3α + 120° = 180° 4α = 180° - 120° = 60° α =60°/4 = 15° . so, first acute angle of triangle (α) =15° and second acute angle (3α) = 45°

33.

One of the acute angles of an obtuse angled triangle is one-third of the second one.If the obtuse angle of the triangle is 120 degree,find the sizes of the two acute angles of the triangle.

Answer»

The TWO acute angles of the triangle are 15° and 45° respectively.

Step-by-step EXPLANATION:

Let, FIRST acute angle of triangle = α

then second acute angle is = 3α (GIVEN)

And obtuse angle = 120° (Given)

As, we know that the sum of the three angles of a triangle is 180° .

∴ α + 3α + 120° = 180°

4α = 180° - 120° = 60°

α =60°/4 = 15° .

so, first acute angle of triangle (α) =15°

and second acute angle (3α) = 45°

Discussion

34.	Write an algebric expression. Sum of x and 3 subtracted from the product of 11 and x ?
Answer» Answer: 11 * X - x + 3 Step-by-step EXPLANATION:

34.

Write an algebric expression. Sum of x and 3 subtracted from the product of 11 and x ?

Answer»

Answer:

11 * X - x + 3

Step-by-step EXPLANATION:

Discussion

35.	Which topic I should practice for prmo from hall and night book
Answer» Step-by-step EXPLANATION: PERMUTATIONS and mutations geometry most important topics Mark as brainliest follow me all the BEST :)

35.

Which topic I should practice for prmo from hall and night book

Answer»

Step-by-step EXPLANATION:

PERMUTATIONS and mutations

geometry

most important topics

Mark as brainliest

follow me

all the BEST :)

Discussion

36.	The surface area of the sphere is 144pie cmsquare then what is its volume?
Answer» Answer: here is your answer Step-by-step explanation: the SURFACE area of the sphere is 4 pie r square. volume of the sphere is 4 by 3 pie r cube. and then volume of sphere . V=A3by2by 6ROOT pie = 144 3by2 by 6.root pie. the answer is 162.4866. THANK you

36.

The surface area of the sphere is 144pie cmsquare then what is its volume?

Answer»

Answer:

here is your answer

Step-by-step explanation:

the SURFACE area of the sphere is 4 pie r square. volume of the sphere is 4 by 3 pie r cube. and then volume of sphere . V=A3by2by 6ROOT pie = 144 3by2 by 6.root pie. the answer is 162.4866. THANK you

Discussion

37.	If -5< x
Answer» ANSWER: -20 Step-by-step EXPLANATION:

37.

If -5< x

Answer»

ANSWER:

-20

Step-by-step EXPLANATION:

Discussion

38.	Ifthen find the value of
Answer» Step-by-step explanation: 5÷x = 20480 y √7 =0 make has a BRAINLY

38.

Ifthen find the value of

Answer»

Step-by-step explanation:

5÷x

= 20480

y √7

=0

make has a BRAINLY

Discussion

39.	(0) (0.1)(D) (0,2)Q.11If [sin x) + 2[cosx) = -3 (I) denotes the greatestinteger function) then range of f(x) = sin x +cosx is
Answer» ANSWER: ANS will be 00 Step-by-step EXPLANATION: HOPE so it will HELP you

39.

(0) (0.1)(D) (0,2)Q.11If [sin x) + 2[cosx) = -3 (I) denotes the greatestinteger function) then range of f(x) = sin x +cosx is

Answer»

ANSWER:

ANS will be 00

Step-by-step EXPLANATION:

HOPE so it will HELP you

Discussion

40.	Find the common factors of 4m2,6m2,8m3
Answer» Answer: 4m is CF............................

40.

Find the common factors of 4m2,6m2,8m3

Answer»

Answer:

4m is CF............................

Discussion

41.	2% of 250 + 1.8% of 400=?
Answer» ANSWER: ##### 5 + 7.2 = 12.2 ### Step-by-step EXPLANATION: %=100

41.

2% of 250 + 1.8% of 400=?

Answer»

ANSWER:

#####

5 + 7.2

= 12.2

###

Step-by-step EXPLANATION:

%=100

Discussion

42.	5.Let ABC be a triangle such that AB = (x - 1) cm, AC = (2root x) cm, BC = (x + 1) cm. Then:(a) A = 90°(b) B=90°(c) C=90°(d)none of these
Answer» ANSWER: a=90 is the answer ..... Verification if a =90 apply pytahoras theorem and U will let that HYPOTENUSE square =BASE square +perpendicular square. Try it Brainliest please joi aai akhom

42.

5.Let ABC be a triangle such that AB = (x - 1) cm, AC = (2root x) cm, BC = (x + 1) cm. Then:(a) A = 90°(b) B=90°(c) C=90°(d)none of these

Answer»

ANSWER:

a=90 is the answer .....

Verification if a =90 apply pytahoras theorem and U will let that HYPOTENUSE square =BASE square +perpendicular square.

Try it

Brainliest please

joi aai akhom

Discussion

43.	Find rate per annum if principal = rupees 1200, time = 3 years and amount = Rupees 1500
Answer» Step-by-step EXPLANATION: wieldy DIVORCING INFIX TICINO

43.

Find rate per annum if principal = rupees 1200, time = 3 years and amount = Rupees 1500

Answer»

Step-by-step EXPLANATION:

wieldy DIVORCING INFIX TICINO

Discussion

44.	(18) The external surface of an iron pipe oflength 70 cm is painted for 2800. If therate of painting is 25 per sq.cm, find theradius and the volume of the pipe (correctto two places of decimal).
Answer» Dimensions of a Iron pipe: Length of the pipe (H) = 70 cm $Cost \: of \: painting\: external \: surface\\of \: the \: pipe = C.S.A \: of \: cylinder = Rs\: 2800$ $Let \: radius \: of \:the \:pipe = r \:cm$ /* ACCORDING to the problem GIVEN */ $1 \: square \:cm \: painting \: Cost \: Rs \:25 \\Now, Area \: of \: painting \: external \:surface \\of \:the \:pipe = \frac{2800}{25} = 112 \: cm^{2}$ $\boxed { \pink { CSA \: of \: a /: cylinder = 2\pi rh }}$ $\implies 2\pi rh = 112$ $\implies 2 \times \frac{22}{7} \times r \times <klux>70</klux> = 112$ $\implies r = \frac{ 22\times 7}{2 \times 22\times 70 } \\= 0.25 \:cm$ $Volume \: of \:the \:pipe (V) = \pi r^{2} h \\= \frac{22}{7} \times (0.25)^{2} \times 70 \\= 13.75 \:cm^{3}$ THEREFORE., $\red { Radius \: of \:the \:pipe }\green {= 0.25\:cm }$ $\red { Volume \: of \:the \:pipe }\green {= 13.75\:cm^{3} }$ •••♪

44.

(18) The external surface of an iron pipe oflength 70 cm is painted for 2800. If therate of painting is 25 per sq.cm, find theradius and the volume of the pipe (correctto two places of decimal).

Answer»

Dimensions of a Iron pipe:

Length of the pipe (H) = 70 cm

$Cost \: of \: painting\: external \: surface\\of \: the \: pipe = C.S.A \: of \: cylinder = Rs\: 2800$

$Let \: radius \: of \:the \:pipe = r \:cm$

/* ACCORDING to the problem GIVEN */

$1 \: square \:cm \: painting \: Cost \: Rs \:25 \\Now, Area \: of \: painting \: external \:surface \\of \:the \:pipe = \frac{2800}{25} = 112 \: cm^{2}$

$\boxed { \pink { CSA \: of \: a /: cylinder = 2\pi rh }}$

$\implies 2\pi rh = 112$

$\implies 2 \times \frac{22}{7} \times r \times <klux>70</klux> = 112$

$\implies r = \frac{ 22\times 7}{2 \times 22\times 70 } \\= 0.25 \:cm$

$Volume \: of \:the \:pipe (V) = \pi r^{2} h \\= \frac{22}{7} \times (0.25)^{2} \times 70 \\= 13.75 \:cm^{3}$

THEREFORE.,

$\red { Radius \: of \:the \:pipe }\green {= 0.25\:cm }$

$\red { Volume \: of \:the \:pipe }\green {= 13.75\:cm^{3} }$

•••♪

Discussion

45.	If the areas of two similar triangles are equal ,prove that they are congruent
Answer» Answer: here is your answer Step-by-step explanation: All ANGLES would be same and side will be proportional to each other, if the areas are equal then k=1 then all sides also becomes same which makes both the TRIANGLES CONGURENT.

45.

If the areas of two similar triangles are equal ,prove that they are congruent

Answer»

Answer:

here is your answer

Step-by-step explanation:

All ANGLES would be same and side will be proportional to each other, if the areas are equal then k=1 then all sides also becomes same which makes both the TRIANGLES CONGURENT.

Discussion

46.	What sum of money will amount to ₹7600 at the rate of 6% p.a, on S.I in 5 years
Answer» <P>Answer: 5846.15 RS Step-by-step explanation: *S.I = P RT/100* AmOUNT =P + SI SI = AmOUNT - P *7600- P = (P65)/100* *(7600 -P ) 100 = 30 P 760000 - 100P = 30P 760000 = 130P P = 5846.15 RS**

46.

What sum of money will amount to ₹7600 at the rate of 6% p.a, on S.I in 5 years

Answer»

<P>Answer:

5846.15 RS

Step-by-step explanation:

S.I = P *R*T/100

AmOUNT =P + SI

SI = AmOUNT - P

7600- P = (P*6*5)/100

(7600 -P ) * 100 = 30 P

760000 - 100P = 30P

760000 = 130P

P = 5846.15 RS

Discussion

47.	. What should be added to twice of
Answer» ANSWER: such as EASY question Step-by-step EXPLANATION: HAHAHA

47.

. What should be added to twice of

Answer»

ANSWER:

such as EASY question

Step-by-step EXPLANATION:

HAHAHA

Discussion

48.	The speeds of three cars are in the ratio 5.4. The ratio benveen the time taken by them to travelthe same distance is1) 5:4:62) 6:4.53) 10:12:154) 12:15: 10In a ollage, the ratio of the number of boys to girls is 8:5. If there are 160 gids, find the total number
Answer» the INFORMATION GIVEN is INSUFFICIENT

48.

The speeds of three cars are in the ratio 5.4. The ratio benveen the time taken by them to travelthe same distance is1) 5:4:62) 6:4.53) 10:12:154) 12:15: 10In a ollage, the ratio of the number of boys to girls is 8:5. If there are 160 gids, find the total number

Answer»

the INFORMATION GIVEN is INSUFFICIENT

Discussion

49.	low price of 3 chairs and tables 4500 rupees price of 5 chairs and 3 table is 7000 Rupees then find the total price of two chairs and tables
Answer» Step-by-step explanation: take cost of CHAIR = X and cost of table =Y 3x+3y=4500 5x+3y=7000 by additive inverse it becomes 3x+3y=4500 -5x-3y=-7000 it becomes -2x=-2500 minus sinse GET cancelled x=1250 from substituting from 1st equation y=3(1250)+3y=4500 y=3750+3y=4500 3y=4500-3750 3y=750 y=750/3 y=250 plz mark me in BRAINIEST ANSWER

49.

low price of 3 chairs and tables 4500 rupees price of 5 chairs and 3 table is 7000 Rupees then find the total price of two chairs and tables

Answer»

Step-by-step explanation:

take cost of CHAIR = X

and cost of table =Y

3x+3y=4500

5x+3y=7000

by additive inverse it becomes

3x+3y=4500

-5x-3y=-7000

it becomes

-2x=-2500

minus sinse GET cancelled

x=1250

from substituting from 1st equation

y=3(1250)+3y=4500

y=3750+3y=4500

3y=4500-3750

3y=750

y=750/3

y=250

plz mark me in BRAINIEST ANSWER

Discussion

50.	Factorise X square + 21 X + 110
Answer» Step-by-step explanation: x² + 21 x + 110 x² + 11x + 10X + 110 x(x+11) + 10(x+11) so, the FACTORS are (x+10)(x+11)

50.

Factorise X square + 21 X + 110

Answer»

Step-by-step explanation:

x² + 21 x + 110

x² + 11x + 10X + 110

x(x+11) + 10(x+11)

so, the FACTORS are (x+10)(x+11)

Discussion

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