332354 + Interview Questions in Secondary School in Math

1.	A train travels 700m in 35 seconds. What is its speed in km/hr?
Answer» ANSWER: SPEED of train is 20 km/h Step-by-step explanation: Speed = DISTANCE travelled Time taken Speed = 700 35 Speed = 20 km/h Hence, proved.

1.

A train travels 700m in 35 seconds. What is its speed in km/hr?

Answer»

ANSWER:

SPEED of train is 20 km/h

Step-by-step explanation:

Speed = DISTANCE travelled

Time taken

Speed = 700

35

Speed = 20 km/h

Hence, proved.

Discussion

2.	0713. A = {x: x is a prime, x < 20), B = {x :x e W. x
Answer» A={2,3,5,7,1,13,17} HOPE it is HELPFUL

2.

0713. A = {x: x is a prime, x < 20), B = {x :x e W. x

Answer»

A={2,3,5,7,1,13,17}

HOPE it is HELPFUL

Discussion

3.	HCF of 300and 550 is
Answer» Answer: 75 Step-by-step EXPLANATION: HCF of 300 and 550 is 75.

3.

HCF of 300and 550 is

Answer»

Answer:

75

Step-by-step EXPLANATION:

HCF of 300 and 550 is 75.

Discussion

4.	5/6x + 3/8x = 2+1/3x (Solve the following linear equation)
Answer» Step-by-step explanation: 3x+ 5 1 =2−X 4x=2− 5 1 4x= 5 9 x= 20 9 CHECK: LHS⇒3x+ 5 1 =3( 20 9 )+ 5 1 ⇒ 20 31 ⇒2− 20 9 =RHS ⇒ x= 20 9

4.

5/6x + 3/8x = 2+1/3x (Solve the following linear equation)

Answer»

Step-by-step explanation:

3x+

5

1

=2−X

4x=2−

5

1

4x=

5

9

x=

20

9

CHECK:

LHS⇒3x+

5

1

=3(

20

9

)+

5

1

⇒

20

31

⇒2−

20

9

=RHS

⇒

x=

20

9

Discussion

5.	Root x-1 - root x+1 = 0 , find value of 4x
Answer» ANSWER: Step-by-step EXPLANATION: Ffg-voyp-exg cam HOT SEX

5.

Root x-1 - root x+1 = 0 , find value of 4x

Answer»

ANSWER:

Step-by-step EXPLANATION:

Ffg-voyp-exg

cam HOT SEX

Discussion

6.	Solve the recurrence a(r) - 7a(r-1) + 10a(r-2) = 0 with initial conditions a0= 0 andal = 3.W
Answer» Step-by-step explanation: A sinusoidal alternating voltage is represented as V( t) = 12 SIN (120pie t) V. The time taken to reach 9.6V for the first time is Optien A: 2.46 secA sinusoidal alternating voltage is represented as v( t) = 12 sin (120pie t) V. The time taken to reach 9.6V for the first time isA sinusoidal alternating voltage is represented as v( t) = 12 sin (120pie t) V. The time taken to reach 9.6V for the first time is Optien A: 2.46 sec Option B. 3 msec Option C: 2.46 msec Option D: 5 msec Optien A: 2.46 sec Option B. 3 msec Option C: 2.46 msec Option D: 5 msec Option B. 3 msec Option C: 2.46 msec Option D: 5 msec

6.

Solve the recurrence a(r) - 7a(r-1) + 10a(r-2) = 0 with initial conditions a0= 0 andal = 3.W

Answer»

Step-by-step explanation:

A sinusoidal alternating voltage is represented as V( t) = 12 SIN (120pie t) V. The time

taken to reach 9.6V for the first time is

Optien A: 2.46 secA sinusoidal alternating voltage is represented as v( t) = 12 sin (120pie t) V. The time

taken to reach 9.6V for the first time isA sinusoidal alternating voltage is represented as v( t) = 12 sin (120pie t) V. The time

taken to reach 9.6V for the first time is

Optien A: 2.46 sec

Option B. 3 msec

Option C:

2.46 msec

Option D: 5 msec

Optien A: 2.46 sec

Option B. 3 msec

Option C:

2.46 msec

Option D: 5 msec

Option B. 3 msec

Option C:

2.46 msec

Option D: 5 msec

Discussion

7.	Add question tag Go away - ?
Answer» ANSWER: will you Step-by-step explanation: it's a RULE of add QUESTION TAG that if anyone give you a ORDER then you take as add question tag = will you

7.

Add question tag Go away - ?

Answer»

ANSWER:

will you

Step-by-step explanation:

it's a RULE of add QUESTION TAG that if anyone give you a ORDER then you take as add question tag = will you

Discussion

8.	5. How many different words can be formed with the letters of word 'UNIVERSITY'so that allthe vowels occur together?
Answer» Answer: 60480 Step-by-step explanation: Given as The word ‘UNIVERSITY’ Here's 10 letters in the word ‘UNIVERSITY’ out of which 2 are I’s Here's are 4 VOWELS in the word ‘UNIVERSITY’ out of which 2 are I’s THEREFORE these vowels can be put TOGETHER in n!/ (p! × q! × r!) = 4! / 2! Ways Now, let us consider these 4 vowels as one letter, remaining 7 letters can be arranged in 7! Ways. Thus, the required number of ARRANGEMENTS = (4! / 2!) × 7! = (4 × 3 × 2 × 1 × 7 × 6 × 5 × 4 × 3 × 2 × 1) / (2 × 1) = 4 × 3 × 2 × 1 × 7 × 6 × 5 × 4 × 3 = 60480

8.

5. How many different words can be formed with the letters of word 'UNIVERSITY'so that allthe vowels occur together?

Answer»

Answer:

60480

Step-by-step explanation:

Given as

The word ‘UNIVERSITY’ Here's 10 letters in the word ‘UNIVERSITY’ out of which 2 are I’s

Here's are 4 VOWELS in the word ‘UNIVERSITY’ out of which 2 are I’s

THEREFORE these vowels can be put TOGETHER in n!/ (p! × q! × r!) = 4! / 2! Ways

Now, let us consider these 4 vowels as one letter, remaining 7 letters can be arranged in 7! Ways.

Thus, the required number of ARRANGEMENTS = (4! / 2!) × 7!

= (4 × 3 × 2 × 1 × 7 × 6 × 5 × 4 × 3 × 2 × 1) / (2 × 1)

= 4 × 3 × 2 × 1 × 7 × 6 × 5 × 4 × 3

= 60480

Discussion

9.	In the given figure of ∆ ABC ,
Answer» Answer: I THINK the ANS will be 78... mark as branliast and follow me...

9.

In the given figure of ∆ ABC ,

Answer»

Answer:

I THINK the ANS will be 78...

mark as branliast and follow me...

Discussion

10.	Box with length, width and height respectively5a, 3a2, 7a)
Answer» ANSWER: then what we do with these measurements Step-by-step EXPLANATION:

10.

Box with length, width and height respectively5a, 3a2, 7a)

Answer»

ANSWER:

then what we do with these measurements

Step-by-step EXPLANATION:

Discussion

11.	write a program to display sum of the following series by scanner class 1/√2+2/√3+3/√4+4/√5+5/√6+6/√7+7/√8+8/√9
Answer» ANSWER: usjdmffnfks Step-by-step EXPLANATION: bsjsrjfkskak

11.

write a program to display sum of the following series by scanner class 1/√2+2/√3+3/√4+4/√5+5/√6+6/√7+7/√8+8/√9

Answer»

ANSWER:

usjdmffnfks

Step-by-step EXPLANATION:

bsjsrjfkskak

Discussion

12.	76835 : 54613 : 94328 : ?(1) 52635(2) 72106(3) 81605(4) 62117
Answer» ANSWER: 81605 is RIGHT answer PLEASE MARK me a BRAINIEST

12.

76835 : 54613 : 94328 : ?(1) 52635(2) 72106(3) 81605(4) 62117

Answer»

ANSWER:

81605 is RIGHT answer

PLEASE MARK me a BRAINIEST

Discussion

13.	Sin4 theeta + Cos4 theeta/1 - 2 sin2 theeta cos2 theeta
Answer» Answer: GOOD Evening DEAR and MARK my answer as BRAINLIEST answer..

13.

Sin4 theeta + Cos4 theeta/1 - 2 sin2 theeta cos2 theeta

Answer»

Answer:

GOOD Evening DEAR and MARK my answer as BRAINLIEST answer..

Discussion

14.	42/3 +31/4 chiffon to make a house
Answer» Answer: 4 2/3 + 3 1/4= Step-by-step explanation: 4 2/3 + 3 1/4 4/1 * 2/3 + 3/1 * 1/4 43/21 + 34/11 12/2 + 12/1 6+12/1 18/1 18

14.

42/3 +31/4 chiffon to make a house

Answer»

Answer:

4 2/3 + 3 1/4=

Step-by-step explanation:

4 2/3 + 3 1/4

4/1 * 2/3 + 3/1 * 1/4

4*3/2*1 + 3*4/1*1

12/2 + 12/1

6+12/1

18/1

18

Discussion

15.	Find each interior angle of polygon of 18 sides.
Answer» Answer: I THINK it will be 40 degree Step-by-step EXPLANATION: Not SURE but pls mark as BRAINLIEST

15.

Find each interior angle of polygon of 18 sides.

Answer»

Answer:

I THINK it will be 40 degree

Step-by-step EXPLANATION:

Not SURE but pls mark as BRAINLIEST

Discussion

16.	3,1,-1,-3 ಸಮಾಂತರ ಶ್ರೇಡಿಯ ಸಾಮಾನ್ಯ ವ್ಯತ್ಯಾಸ
Answer» Step-by-step EXPLANATION: $\red{ \underline \red{ \over{ \mid \green{{\huge \frak{QuésTion:-}}} \mid}}}$ ★ FIND the perimeter of a rectangle if its length is 15m and one of the DIAGONALS is 17 m Cuba Norway South Korea the United States $\red{ \underline \red{ \over{ \mid \green{{\huge \frak{₳ηsωεя:-}}} \mid}}}$ South Korea The two major disadvantages of wind power include INITIAL cost and technology IMMATURITY. Firstly, constructing turbines and wind facilities is extremely expensive. The second disadvantage is technology immaturity.

16.

3,1,-1,-3 ಸಮಾಂತರ ಶ್ರೇಡಿಯ ಸಾಮಾನ್ಯ ವ್ಯತ್ಯಾಸ

Answer»

Step-by-step EXPLANATION:

$\red{ \underline \red{ \over{ \mid \green{{\huge \frak{QuésTion:-}}} \mid}}}$

★ FIND the perimeter of a rectangle if its length is 15m and one of the

DIAGONALS is 17 m

Cuba

Norway

South Korea

the United States

$\red{ \underline \red{ \over{ \mid \green{{\huge \frak{₳ηsωεя:-}}} \mid}}}$

South Korea

The two major disadvantages of wind power include INITIAL cost and technology IMMATURITY. Firstly, constructing turbines and wind facilities is extremely expensive.

The second disadvantage is technology immaturity.

Discussion

17.	Cricter scoren find the mean
Answer» Answer: informal British. (in sports other than cricket) an unusually high score. More example sentences. 'England looked SET to RUN up a cricket score when they went four TRIES ahead'

17.

Cricter scoren find the mean

Answer»

Answer:

informal British. (in sports other than cricket) an unusually high score. More example sentences. 'England looked SET to RUN up a cricket score when they went four TRIES ahead'

Discussion

18.	160lo find the remainder when x3 + 3x2+ 3x + 1is divide by at x+1.
Answer» Answer: REMAINDER =0 Step-by-step explanation: x=-1 substitute -1^3+3(-1)^2+3(-1)+1 -1+3-3+1 0 HOPE it helps U

18.

160lo find the remainder when x3 + 3x2+ 3x + 1is divide by at x+1.

Answer»

Answer:

REMAINDER =0

Step-by-step explanation:

x=-1

substitute

-1^3+3(-1)^2+3(-1)+1

-1+3-3+1

0

HOPE it helps U

Discussion

19.	In ax + b , what is the no.s of zeros.
Answer» ANSWER: 0 is the answer and PLEASE FOLLOW me

19.

In ax + b , what is the no.s of zeros.

Answer»

ANSWER:

0 is the answer and PLEASE FOLLOW me

Discussion

20.	the cost price of a book is rupees 150 if the successive discount offer on the book is 5%, 10% and 15% then calculate the total discount selling price of the book
Answer» ANSWER: PLS folllllow me plsssssssssssssssssssssssssssssssssssssssssssss

20.

the cost price of a book is rupees 150 if the successive discount offer on the book is 5%, 10% and 15% then calculate the total discount selling price of the book

Answer»

ANSWER:

PLS folllllow me plsssssssssssssssssssssssssssssssssssssssssssss

Discussion

21.	Expand the given equation: (a + b)²1️⃣ a² + 2ab + 2b2️⃣ a² + 2ab + b²3️⃣ 2a + 2ab + 2b4️⃣ a² + b²
Answer» ANSWER: A SQUARE +B square +2ab second is RIGHT

21.

Expand the given equation: (a + b)²1️⃣ a² + 2ab + 2b2️⃣ a² + 2ab + b²3️⃣ 2a + 2ab + 2b4️⃣ a² + b²

Answer»

ANSWER:

A SQUARE +B square +2ab

second is RIGHT

Discussion

22.	Rate = 18% p.a.Time = 7 years6. Find the Amount if Principal = 10000(1 Point)Enter your answer7. At what rate per cent per annum will 250 amount to 330 in 4 years? *
Answer» Answer: 5 Step-by-step EXPLANATION: SORRY i don't KNOW PLEASE MARK me as brainlaist

22.

Rate = 18% p.a.Time = 7 years6. Find the Amount if Principal = 10000(1 Point)Enter your answer7. At what rate per cent per annum will 250 amount to 330 in 4 years? *

Answer»

Answer:

5

Step-by-step EXPLANATION:

SORRY i don't KNOW PLEASE MARK me as brainlaist

Discussion

23.	Express the complex noumberform and exponential form.in polarIt
Answer» Answer: If you have a COMPLEX NUMBER z = r(cos(θ) + i sin(θ)) WRITTEN in polar form, you can use Euler's FORMULA to write it even more concisely in exponential form: z = re^(iθ). Step-by-step explanation: please THANKING my answer

23.

Express the complex noumberform and exponential form.in polarIt

Answer»

Answer:

If you have a COMPLEX NUMBER z = r(cos(θ) + i sin(θ)) WRITTEN in polar form, you can use Euler's FORMULA to write it even more concisely in exponential form: z = re^(iθ).

Step-by-step explanation:

please THANKING my answer

Discussion

24.	Draw and explain briefly Nitrogen cycle
Answer» The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple CHEMICAL forms as it circulates among atmosphere, TERRESTRIAL, and MARINE ecosystems. ... Important processes in the nitrogen cycle INCLUDE fixation, ammonification, nitrification, and denitrification

Discussion

25.	A two digit number is such that the product of its digit is 6. If is added to the number the digit interchange their places. find the number.
Answer» Answer: 23 is the number Step-by-step explanation: 2*3=6 and by ADDING 9 it's BECOME 32

25.

A two digit number is such that the product of its digit is 6. If is added to the number the digit interchange their places. find the number.

Answer»

Answer:

23 is the number

Step-by-step explanation:

2*3=6

and by ADDING 9 it's BECOME 32

Discussion

26.	17. Divide :- (a) -76 by -19(b) -639 by -71
Answer» ANSWER a 4.15 answer b 37.58 mark as BRAINLIST

26.

17. Divide :- (a) -76 by -19(b) -639 by -71

Answer»

ANSWER a

4.15

answer b

37.58

mark as BRAINLIST

Discussion

27.	Find the sum of (67) + (–1 2) + (– 65) + (– 25)
Answer» 100+80+10=190 Step-by-step EXPLANATION: FOLLOWING me

27.

Find the sum of (67) + (–1 2) + (– 65) + (– 25)

Answer»

100+80+10=190

Step-by-step EXPLANATION:

FOLLOWING me

Discussion

28.	If y = ( x + ✓x² -1 ) ^ m , then ✓x²- ✓1 dy/dx = ?
Answer» Step-by-step EXPLANATION: don't KNOW about this ANSWER...

28.

If y = ( x + ✓x² -1 ) ^ m , then ✓x²- ✓1 dy/dx = ?

Answer»

Step-by-step EXPLANATION:

don't KNOW about this ANSWER...

Discussion

29.	Draw venn diagram for followers sets A=(2,4,6,8) B=(1,3,5,7) C=(x:x= 2k+1k
Answer» ANSWER: C PLEASE MARK as BRAINLEST

29.

Draw venn diagram for followers sets A=(2,4,6,8) B=(1,3,5,7) C=(x:x= 2k+1k

Answer»

ANSWER:

C

PLEASE MARK as BRAINLEST

Discussion

30.	If x² + 1/x² = 38, find the value of: x4 + 1/x4.
Answer» GIVEN :– $\\ \implies \bf {x}^{2} + \dfrac{1}{ {x}^{2} } = 38 \\$ TO FIND :– $\\ \implies \bf {x}^{4} + \dfrac{1}{ {x}^{4} } =?\\$ SOLUTION :– $\\ \implies \bf {x}^{2} + \dfrac{1}{ {x}^{2} } = 38 \\$ • SQUARE on both sides – $\\ \implies \bf \bigg({x}^{2} + \dfrac{1}{ {x}^{2} } \bigg)^{2} =(38)^{2} \\$ $\\ \implies \bf \bigg({x}^{2} + \dfrac{1}{ {x}^{2} } \bigg)^{2} =1444 \\$ • USING IDENTITY – $\\ \implies \large\pink{ \boxed{\bf (a + b)^{2} = {a}^{2} + {b}^{2} + 2ab}}\\$ • So that – $\\ \implies \bf {({x}^{2})}^{2} + \bigg(\dfrac{1}{ {x}^{2} } \bigg)^{2} + 2( {x}^{2})\bigg(\dfrac{1}{ {x}^{2} } \bigg)=1444 \\$ $\\ \implies \bf {x}^{4} +\dfrac{1}{ {x}^{4} }+ 2 \cancel{( {x}^{2})}\bigg(\dfrac{1}{ \cancel{ {x}^{2} }} \bigg)=1444 \\$ $\\ \implies \bf {x}^{4} +\dfrac{1}{ {x}^{4} }+ 2=1444 \\$ $\\ \implies \bf {x}^{4} +\dfrac{1}{ {x}^{4} }=1444 - 2 \\$ $\\ \implies \large \red { \boxed{\bf {x}^{4} +\dfrac{1}{ {x}^{4} }=1442 }}\\$

30.

If x² + 1/x² = 38, find the value of: x4 + 1/x4.

Answer»

GIVEN :–

$\\ \implies \bf {x}^{2} + \dfrac{1}{ {x}^{2} } = 38 \\$

TO FIND :–

$\\ \implies \bf {x}^{4} + \dfrac{1}{ {x}^{4} } =?\\$

SOLUTION :–

$\\ \implies \bf {x}^{2} + \dfrac{1}{ {x}^{2} } = 38 \\$

• SQUARE on both sides –

$\\ \implies \bf \bigg({x}^{2} + \dfrac{1}{ {x}^{2} } \bigg)^{2} =(38)^{2} \\$

$\\ \implies \bf \bigg({x}^{2} + \dfrac{1}{ {x}^{2} } \bigg)^{2} =1444 \\$

• USING IDENTITY –

$\\ \implies \large\pink{ \boxed{\bf (a + b)^{2} = {a}^{2} + {b}^{2} + 2ab}}\\$

• So that –

$\\ \implies \bf {({x}^{2})}^{2} + \bigg(\dfrac{1}{ {x}^{2} } \bigg)^{2} + 2( {x}^{2})\bigg(\dfrac{1}{ {x}^{2} } \bigg)=1444 \\$

$\\ \implies \bf {x}^{4} +\dfrac{1}{ {x}^{4} }+ 2 \cancel{( {x}^{2})}\bigg(\dfrac{1}{ \cancel{ {x}^{2} }} \bigg)=1444 \\$

$\\ \implies \bf {x}^{4} +\dfrac{1}{ {x}^{4} }+ 2=1444 \\$

$\\ \implies \bf {x}^{4} +\dfrac{1}{ {x}^{4} }=1444 - 2 \\$

$\\ \implies \large \red { \boxed{\bf {x}^{4} +\dfrac{1}{ {x}^{4} }=1442 }}\\$

Discussion

31.	[tex]sin^{2}1 + sin^{2}2 +sin^{2} 3+.............. +sin^{2}89 = ?
Answer» Answer: ANSWER 1+sin2A−cos2A 1+sin2A+cos2A = sin2A+1−(1−2sin 2 A) sin2A+1+2cos 2 A−1 = 2sinAcosA+2sin 2 A 2sinAcosA+2cos 2 A = 2SINA(cosA+sinA) 2cosA(sinA+cosA) = sinA cosA =COTA.

31.

[tex]sin^{2}1 + sin^{2}2 +sin^{2} 3+.............. +sin^{2}89 = ?

Answer»

Answer:

ANSWER

1+sin2A−cos2A

1+sin2A+cos2A

=

sin2A+1−(1−2sin

2

A)

sin2A+1+2cos

2

A−1

=

2sinAcosA+2sin

2

A

2sinAcosA+2cos

2

A

=

2SINA(cosA+sinA)

2cosA(sinA+cosA)

=

sinA

cosA

=COTA.

Discussion

32.	X 2(xii)3 5 -1615. 2x34 and check
Answer» ANSWER: ×5957:)_63_;',(--((( Step-by-step explanation: if GO out disposal do the TUG

32.

X 2(xii)3 5 -1615. 2x34 and check

Answer»

ANSWER:

×5957:)_63_;',(--(((

Step-by-step explanation:

if GO out disposal do the TUG

Discussion

33.	What is the distance of the pointP(4,3) from the y-axis?
Answer» Distance of point P(4,3) from Y - AXIS will be 4 units. The pt. is on y - axis so, its x co - ordinate will be 0. Also, we have to find distance between them. So, the distance between them will be perpendicular. Therefore, co-ordinates of point A on y - axis A(0, 3) d(AP)^2 = (X2 - X1)^2 + (Y2 - Y1)^2 = (4 - 0)^2 + (3 - 3)^2 = (4)^2 + 0 = 16 + 0 = 16 d(AP)^2 = 16 Therefore, d(AP) = 4 units {Taking SQUARE root on both SIDE}

33.

What is the distance of the pointP(4,3) from the y-axis?

Answer»

Distance of point P(4,3) from Y - AXIS will be 4 units.

The pt. is on y - axis so, its x co - ordinate will be 0. Also, we have to find distance between them. So, the distance between them will be perpendicular.

Therefore, co-ordinates of point A on y - axis A(0, 3)

d(AP)^2 = (X2 - X1)^2 + (Y2 - Y1)^2

= (4 - 0)^2 + (3 - 3)^2

= (4)^2 + 0

= 16 + 0

= 16

d(AP)^2 = 16

Therefore, d(AP) = 4 units {Taking SQUARE root on both SIDE}

Discussion

34.	In ∆ABC ,
Answer» Answer: 5cm।।।।।।।।।।।।।।।।

34.

In ∆ABC ,

Answer»

Answer:

5cm।।।।।।।।।।।।।।।।

Discussion

35.	Convert 8km to 435m to m.
Answer» Answer: 8km 435M to m 1Km = 1000 m So, 8km 435m= 8x1000+ 435 => 8000+435 => 8435 metres Step-by-step explanation: HOPE it helps

35.

Convert 8km to 435m to m.

Answer»

Answer:

8km 435M to m

1Km = 1000 m

So, 8km 435m= 8x1000+ 435

=> 8000+435

=> 8435 metres

Step-by-step explanation:

HOPE it helps

Discussion

36.	∆ABC ≅ ∆FDE and AB = 6cm ,
Answer» Answer: 6cm STEP by step EXPLANATION :

36.

∆ABC ≅ ∆FDE and AB = 6cm ,

Answer»

Answer:

6cm

STEP by step EXPLANATION :

Discussion

37.	Q.5) Sides of a triangles are in the ratio of 12:17:25 and itsperimeter is 540 cm. Find its area. OR Q.7)Prove that the sum of the angles of a triangles is 180.
Answer» Answer: 9000 cm^2 Step-by-step explanation: ⇒Let X be common ratio ∴ SIDES of triangle will be: 12x,17x and 25x ⇒Perimeter =540 cm(GIVEN) ⇒12x+17x+25x=540 cm, ⇒54x=540 cm ⇒x=10 cm ∴ Sides of triangle: a=120,b=170,c=250 cms ⇒2S=540 ⇒S=270 cm A= s(s−a)(s−b)(s−c) = 270(270−120)(270−170)(270−250) cm^2 = 270×150×100×20 cm^2 A=9000 cm^2

37.

Q.5) Sides of a triangles are in the ratio of 12:17:25 and itsperimeter is 540 cm. Find its area. OR Q.7)Prove that the sum of the angles of a triangles is 180.

Answer»

Answer:

9000 cm^2

Step-by-step explanation:

⇒Let X be common ratio

∴ SIDES of triangle will be: 12x,17x and 25x

⇒Perimeter =540 cm(GIVEN)

⇒12x+17x+25x=540 cm,

⇒54x=540 cm

⇒x=10 cm

∴ Sides of triangle: a=120,b=170,c=250 cms

⇒2S=540

⇒S=270 cm

A=

s(s−a)(s−b)(s−c)

=

270(270−120)(270−170)(270−250)

cm^2

=

270×150×100×20

cm^2

A=9000 cm^2

Discussion

38.	Find the area of the following fields. alk dimensions are in metre. tell me fast guys plse......
Answer» Answer: Maths solution Step-by-step EXPLANATION: Solution :- 1) Area of the Δ DEI = 1/2 × Base × Height ⇒ 1/2 × 60 × 40 = 1200 SQ m 2) Area of the Trapezium EFGI = 1/2 × (Sum of the two parallel SIDES) × Height ⇒ 1/2 × (60 + 50) × 70 ⇒ 1/2 × 110 × 70 = 3850 sq m 3) Area of the Δ AFG = 1/2 × Base × Height ⇒ 1/2 × 50 × 50 = 1250 sq m 4) Area of the Trapezium ABCH = 1/2 ×(Sum of the two parallel sides) × Height ⇒ 1/2 × (40 + 30) × 80 ⇒ 1/2 × 70 × 80 = 2800 sq m 5) Area of the Δ CDH = 1/2 × Base × Height The height of this figure is not clear in the image. I THINK it is 80 m and I have assumed it 80 m. ⇒ 1/2 × 40 × 80 = 1600 sq m Total area = Area of Δ DEI + Area of the Trapezium EFGI + Area of Δ AFG + Area of Trapezium ABCH + Area of Δ CDH ⇒ 1200 + 3850 + 1250 + 2800 + 1600 = 10700 sq m So, the area of the figure ABCDEF is 10700 sq m

38.

Find the area of the following fields. alk dimensions are in metre. tell me fast guys plse......

Answer»

Answer:

Maths solution

Step-by-step EXPLANATION:

Solution :-

1) Area of the Δ DEI = 1/2 × Base × Height

⇒ 1/2 × 60 × 40

= 1200 SQ m

2) Area of the Trapezium EFGI = 1/2 × (Sum of the two parallel SIDES) × Height

⇒ 1/2 × (60 + 50) × 70

⇒ 1/2 × 110 × 70

= 3850 sq m

3) Area of the Δ AFG = 1/2 × Base × Height

⇒ 1/2 × 50 × 50

= 1250 sq m

4) Area of the Trapezium ABCH = 1/2 ×(Sum of the two parallel sides) × Height

⇒ 1/2 × (40 + 30) × 80

⇒ 1/2 × 70 × 80

= 2800 sq m

5) Area of the Δ CDH = 1/2 × Base × Height

The height of this figure is not clear in the image. I THINK it is 80 m and I have assumed it 80 m.

⇒ 1/2 × 40 × 80

= 1600 sq m

Total area = Area of Δ DEI + Area of the Trapezium EFGI + Area of Δ AFG + Area of Trapezium ABCH + Area of Δ CDH

⇒ 1200 + 3850 + 1250 + 2800 + 1600

= 10700 sq m

So, the area of the figure ABCDEF is 10700 sq m

Discussion

39.	Draw the venn diagrams for it
Answer» ANSWER: nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn Step-by-step EXPLANATION:

39.

Draw the venn diagrams for it

Answer»

ANSWER:

nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Step-by-step EXPLANATION:

Discussion

40.	What is the mode of 13,12,11,13,14,17,12,11,11plzz tell ⚡⚡⚡
Answer» Answer: 11 Step-by-step EXPLANATION: Because it is most REPEATING NUMBER

40.

What is the mode of 13,12,11,13,14,17,12,11,11plzz tell ⚡⚡⚡

Answer»

Answer:

11

Step-by-step EXPLANATION:

Because it is most REPEATING NUMBER

Discussion

41.	Area of rectangle with length = l and widh=b
Answer» Step-by-step EXPLANATION: jshsgdgsgsbbsbshdhdhdhdhhdndhdhs

41.

Area of rectangle with length = l and widh=b

Answer»

Step-by-step EXPLANATION:

jshsgdgsgsbbsbshdhdhdhdhhdndhdhs

Discussion

42.	16 16 24 60 240 ? series answer
Answer» ANSWER: EXAMPLE of elements Step-by-step EXPLANATION:

42.

16 16 24 60 240 ? series answer

Answer»

ANSWER:

EXAMPLE of elements

Step-by-step EXPLANATION:

Discussion

43.	-7 divided by m algebraic expressions
Answer» ANSWER: your answer is -7/m HOPE it HELPS

43.

-7 divided by m algebraic expressions

Answer»

ANSWER:

your answer is -7/m

HOPE it HELPS

Discussion

44.	(ya² + ya +1 ) ÷( 2a +1 )sab meri I'd I'd hai.....
Answer» ANSWER: ANSWER x=2a+1−2a−12a+1+2a−1=(2a+1−2a−1)(2a+1+2a−1).(2a+1+2a−1)(2a+1+2a−1)=2a+1−2a+1(2a+1+2a−1)2=22a+1+2a−1+2(2a+1)(2a−1)⇒2x=4a+2

44.

(ya² + ya +1 ) ÷( 2a +1 )sab meri I'd I'd hai.....

Answer»

ANSWER:

ANSWER

x=2a+1−2a−12a+1+2a−1=(2a+1−2a−1)(2a+1+2a−1).(2a+1+2a−1)(2a+1+2a−1)=2a+1−2a+1(2a+1+2a−1)2=22a+1+2a−1+2(2a+1)(2a−1)⇒2x=4a+2

Discussion

45.	20 Percent more than a number is 600 find the number
Answer» Step-by-step EXPLANATION: What number is 20% of 600? 120 Percentage Calculator: What is 20 PERCENT of 600? = 120.

45.

20 Percent more than a number is 600 find the number

Answer»

Step-by-step EXPLANATION:

What number is 20% of 600?

120

Percentage Calculator: What is 20 PERCENT of 600? = 120.

Discussion

46.	14. In how many different ways the letters of the word ALGEBRA can be arranged in a row if(i) the two A's are together?(ii) the two A's are not together?
Answer» Sol: In a word ALGEBRA have 2 A's and 5 different letters are there. 1) Two A's will take 1 unit and 5 letters will take 5 units then TOTAL number units = 6. These can be arranged in 6! = 6x5x4x3x2x1 = 720 ways. 2) The number of ARRANGEMENTS in which two A's together is = 720 ways. The number of arrangements with out any restriction = 7! / 2! = 2520 ways. The required number of arrangements if two A's are not together = 2520 - 720 = 1800 ways. Hope it helps! Follow me. . Thnkyu! HAVE A GREAT DAY!

46.

14. In how many different ways the letters of the word ALGEBRA can be arranged in a row if(i) the two A's are together?(ii) the two A's are not together?

Answer»

Sol: In a word ALGEBRA have 2 A's and 5 different letters are there.

1) Two A's will take 1 unit and 5 letters will take 5 units then TOTAL number units = 6.

These can be arranged in 6! = 6x5x4x3x2x1 = 720 ways.

2) The number of ARRANGEMENTS in which two A's together is = 720 ways.

The number of arrangements with out any restriction = 7! / 2! = 2520 ways.

The required number of arrangements if two A's are not together = 2520 - 720 = 1800 ways.

Hope it helps!

Follow me. .

Thnkyu!

HAVE A GREAT DAY!

Discussion

47.	Find the sum of series (2³-1³)+(4³-3³)+(6³-15³)+...toI) n termsii)8 terms
Answer» ANSWER: (2-1)= 6-3=3 +(4-3) 16-9=7 7+3=10 (6-15)= 18-45 =27+7+3 =37

47.

Find the sum of series (2³-1³)+(4³-3³)+(6³-15³)+...toI) n termsii)8 terms

Answer»

ANSWER:

(2-1)=

6-3=3

+(4-3)

16-9=7

7+3=10

(6-15)=

18-45

=27+7+3

=37

Discussion

48.	. In triangle ABC , triangle DEF , AB = FD,
Answer» ANSWER: (A) AC=DE Step-by-step explanation: PLEASE MARK MY ANSWER AS BRAINLIEST And FOLLOW ME

48.

. In triangle ABC , triangle DEF , AB = FD,

Answer»

ANSWER:

(A) AC=DE

Step-by-step explanation:

PLEASE MARK MY ANSWER AS BRAINLIEST

And FOLLOW ME

Discussion

49.	In a circle with radius 41cm,two equal chords are at adistance of 9cm from thecentre. Find the lengths of thechord.
Answer» Answer: LENGTH of chord = 80cm Step-by-step explanation: radius of CIRCLE = 41cm distance between the centre and the chord = 9cm By using PYTHAGORAS theorem, we get 41^2 - 9^2 = BASE^ 2 1681 - 81 = base^2 1600 = base^2 base = 40cm therefore length of chord = 2 x 40 = 80 cm

49.

In a circle with radius 41cm,two equal chords are at adistance of 9cm from thecentre. Find the lengths of thechord.

Answer»

Answer:

LENGTH of chord = 80cm

Step-by-step explanation:

radius of CIRCLE = 41cm

distance between the centre and the chord = 9cm

By using PYTHAGORAS theorem, we get

41^2 - 9^2 = BASE^ 2

1681 - 81 = base^2

1600 = base^2

base = 40cm

therefore length of chord = 2 x 40

= 80 cm

Discussion

50.	Will anyone able to solve this.. please help me got this question for exam
Answer» Answer: 30-40 Step-by-step explanation: mode is the class interval with MAXIMUM NUMBER of observation or frequency here the highest frequency is 45 hence the mode is 30-40 HOPE you GOT ur answer PLEASE follow me gyes

50.

Will anyone able to solve this.. please help me got this question for exam

Answer»

Answer:

30-40

Step-by-step explanation:

mode is the class interval with MAXIMUM NUMBER of observation or frequency

here the highest frequency is 45 hence the mode is 30-40

HOPE you GOT ur answer

PLEASE follow me gyes

Discussion

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