332354 + Interview Questions in Secondary School in Math

1.	A can do a piece of work in 10 days while B can do it in 15 days in how many days AandB can complete a work together?
Answer» ONG>Step-by-step explanation: A can do a piece of work in 1 DAY = 1/10 B can do a piece of work in 1 day = 1/15 A and B can complete a work together in 1 day = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6 hence, A and B can complete the work together = 6 days

1.

A can do a piece of work in 10 days while B can do it in 15 days in how many days AandB can complete a work together?

Answer» ONG>Step-by-step explanation:

A can do a piece of work in 1 DAY = 1/10

B can do a piece of work in 1 day = 1/15

A and B can complete a work together in 1 day =

1/10 + 1/15

= 3/30 + 2/30

= 5/30

= 1/6

hence, A and B can complete the work together

= 6 days

Discussion

2.	How many altitudes does a triangle have
Answer» ong>ANSWER: make me brainlist Step-by-step EXPLANATION: three altitudes.

2.

How many altitudes does a triangle have

Answer»

ong>ANSWER:

make me brainlist

Step-by-step EXPLANATION:

three altitudes.

Discussion

3.	Calculate speed of light in water of refractive index 4/3 . given speed of light in air =3×10^8
Answer» ER:::: HOPE it HELPS

3.

Calculate speed of light in water of refractive index 4/3 . given speed of light in air =3×10^8

Answer» ER::::

HOPE it HELPS

Discussion

4.	In a right angled triangle, the length of the hypotenuse is (5x+16) cm. The length of the other two sides are (3x-6)cm and (4x+20)cm. a) Find the values of x [3] b) Hence, calculate the area in cm to the power of 2, of the triangle I don't understand the requirements and I need help :
Answer» ONG>ANSWER: Full answer is photo below. Step-by-step explanation: I HOPE this answer is you useful.

4.

In a right angled triangle, the length of the hypotenuse is (5x+16) cm. The length of the other two sides are (3x-6)cm and (4x+20)cm. a) Find the values of x [3] b) Hence, calculate the area in cm to the power of 2, of the triangle I don't understand the requirements and I need help :

Answer» ONG>ANSWER:

Full answer is photo below.

Step-by-step explanation:

I HOPE this answer is you useful.

Discussion

5.	There are 5 red and 3 black balls in a bag probability of drawing a black ball is -----
Answer» ong>Step-by-step EXPLANATION: NUMBER of favourable outcome=3 total number of outcome=8 proability of drawing a BLACK ball=3/8

5.

There are 5 red and 3 black balls in a bag probability of drawing a black ball is -----

Answer»

ong>Step-by-step EXPLANATION:

NUMBER of favourable outcome=3

total number of outcome=8

proability of drawing a BLACK ball=3/8

Discussion

6.	1) write the number of each vehicle in the table.
Answer» ONG>ANSWER: where is the table? __ PLEASE don't DELETE this

6.

1) write the number of each vehicle in the table.

Answer» ONG>ANSWER:

where is the table? __

PLEASE don't DELETE this

Discussion

7.	एक कक्षा के 30 विद्यार्थियों की औसत आयु 18 वर्ष है। यदि 18-18 वर्ष के दो विद्यार्थी कक्षा से चले जाएँ, तो शेष 28 विद्यार्थियोंकी औसत आयु बताएँ?(1) 24 वर्ष(2)22 वर्ष(3) 20 वर्ष(4)48 वर्ष
Answer» ong>Answer: 48 is right answer Step-by-step EXPLANATION: I HOPE HELP you

7.

एक कक्षा के 30 विद्यार्थियों की औसत आयु 18 वर्ष है। यदि 18-18 वर्ष के दो विद्यार्थी कक्षा से चले जाएँ, तो शेष 28 विद्यार्थियोंकी औसत आयु बताएँ?(1) 24 वर्ष(2)22 वर्ष(3) 20 वर्ष(4)48 वर्ष

Answer»

ong>Answer:

48 is right answer

Step-by-step EXPLANATION:

I HOPE HELP you

Discussion

8.	For what values of K, the roots of the equation 3x^2-10x+K=0 are real? ( Please explain why have to more than or equal to symbol into less than or equal to symbol when a negative sign is involved, in this question)
Answer» ong>Step-by-step explanation: For what values of K, the roots of the EQUATION 3x^2-10x+K=0 are REAL? ( Please explain why have to more than or equal to symbol into less than or equal to symbol when a NEGATIVE sign is involved, in this question)

8.

For what values of K, the roots of the equation 3x^2-10x+K=0 are real? ( Please explain why have to more than or equal to symbol into less than or equal to symbol when a negative sign is involved, in this question)

Answer»

ong>Step-by-step explanation:

For what values of K, the roots of the EQUATION 3x^2-10x+K=0 are REAL? ( Please explain why have to more than or equal to symbol into less than or equal to symbol when a NEGATIVE sign is involved, in this question)

Discussion

9.	Express 4i-6/1-i in the form of a+bi where a, b € R.
Answer» ONG>Answer: b is called the imaginary part of z and is written Im(z)=b. 39 ... If z, = 3 + 2i and Z2=-1 +5i , express in the FORM a+bi, a,beR: ... If pi = Z2 + Izz, find p and I, where Z1-Z3 =22 and p, l € R

Discussion

10.	We launched a campaign TO CHANGE THE NEGETIVE ATTITUDE AROUND DARK SKIN. bolo na sister??
Answer» ong>Answer: Sorry sis MAI offline ho gyi thi Usne kuch nhi kiya.. maine sbko BLOCK KR diya hai kuch logo ko chod k

10.

We launched a campaign TO CHANGE THE NEGETIVE ATTITUDE AROUND DARK SKIN. bolo na sister??

Answer»

ong>Answer:

Sorry sis MAI offline ho gyi thi

Usne kuch nhi kiya.. maine sbko BLOCK KR diya hai

kuch logo ko chod k

Discussion

11.	Draw a pair of tangents to a circle of radius 4.5 cm from a point which is 4 cm away from the circle.
Answer» ong>Answer: I HOPE this will help You Step-by-step EXPLANATION: please mark my answer as brainliest

11.

Draw a pair of tangents to a circle of radius 4.5 cm from a point which is 4 cm away from the circle.

Answer»

ong>Answer:

I HOPE this will help You

Step-by-step EXPLANATION:

please mark my answer as brainliest

Discussion

12.	Express the following ratio as percent
Answer» ong>SORRY *for* *SPAM* *but* *your* *QUESTION* is *WRONG* or *incomplete. Plz* *check* it or *send* *your* *question* *PICTURE*.

12.

Express the following ratio as percent

Answer»

ong>SORRY for SPAM but your QUESTION is WRONG or incomplete.

Plz check it or send your question PICTURE.

Discussion

13.	If y=at^2,x=2at,what is the value of d2y/dx^2 at x =1/2
Answer» ong>Answer: $\tt \dfrac{d^2y}{dx^2} =\dfrac{1}{2a}$ Step-by-step explanation: Given: y = at² x = 2at To Find: $\tt \dfrac{d^2y}{dx^2}\:\: at\:x=\dfrac{1}{2}$ SOLUTION: Given that y = at². Differentiating it with respect to t we get, $\tt \dfrac{dy}{dt} =\dfrac{d}{dt}( at^2)$ $\tt \dfrac{dy}{dt} =2at---(1)$ Also by given x = 2 at Differentiate with respect to t, $\tt \dfrac{dx}{dt} =\dfrac{d}{dt} (2at)$ $\tt \dfrac{dx}{dt} =2a---(2)$ Divide equation 1 by 2, $\tt \dfrac{dy/dt}{dx/dt} =\dfrac{2at}{2a}$ $\tt \dfrac{dy}{dx} =t$ Differentiating again with respect to x, $\tt \dfrac{d^2y}{dx^2} =\dfrac{d}{dx} \bigg(\dfrac{dy}{dx} \bigg)$ By chain rule, $\tt \dfrac{d^2y}{dx^2} =\dfrac{d}{dt} \bigg(\dfrac{dy}{dx} \bigg)\times \dfrac{dt}{dx}$ $\implies \tt \dfrac{d}{dt} \bigg(\dfrac{dy}{dx}\bigg) \div\dfrac{dx}{dt}$ $\implies \tt \dfrac{d}{dt} (t) \div 2a$ $\implies \tt \dfrac{1}{2a}$ SINCE this TERM is independent of x, at x = 1/2 the value would be 1/2a.

13.

If y=at^2,x=2at,what is the value of d2y/dx^2 at x =1/2

Answer»

ong>Answer:

$\tt \dfrac{d^2y}{dx^2} =\dfrac{1}{2a}$

Step-by-step explanation:

Given:

y = at²
x = 2at

To Find:

$\tt \dfrac{d^2y}{dx^2}\:\: at\:x=\dfrac{1}{2}$

SOLUTION:

Given that y = at². Differentiating it with respect to t we get,

$\tt \dfrac{dy}{dt} =\dfrac{d}{dt}( at^2)$

$\tt \dfrac{dy}{dt} =2at---(1)$

Also by given x = 2 at

Differentiate with respect to t,

$\tt \dfrac{dx}{dt} =\dfrac{d}{dt} (2at)$

$\tt \dfrac{dx}{dt} =2a---(2)$

Divide equation 1 by 2,

$\tt \dfrac{dy/dt}{dx/dt} =\dfrac{2at}{2a}$

$\tt \dfrac{dy}{dx} =t$

Differentiating again with respect to x,

$\tt \dfrac{d^2y}{dx^2} =\dfrac{d}{dx} \bigg(\dfrac{dy}{dx} \bigg)$

By chain rule,

$\tt \dfrac{d^2y}{dx^2} =\dfrac{d}{dt} \bigg(\dfrac{dy}{dx} \bigg)\times \dfrac{dt}{dx}$

$\implies \tt \dfrac{d}{dt} \bigg(\dfrac{dy}{dx}\bigg) \div\dfrac{dx}{dt}$

$\implies \tt \dfrac{d}{dt} (t) \div 2a$

$\implies \tt \dfrac{1}{2a}$

SINCE this TERM is independent of x, at x = 1/2 the value would be 1/2a.

Discussion

14.	In reference to a circle the value of pai is equal to A)area/circumference B)area/diameterC) Circumference/diameterD)circumference / radius
Answer» ALIGN="absmiddle" ALT="\huge\bold{\mathtt{\purple{A{\pink{ N{\green{S{\blue{W{\red{E{\ORANGE{R }}}}}}}}}}}}}" class="latex-formula" ID="TexFormula1" src="https://tex.z-dn.net/?f=%5Chuge%5Cbold%7B%5Cmathtt%7B%5Cpurple%7BA%7B%5Cpink%7B%20N%7B%5Cgreen%7BS%7B%5Cblue%7BW%7B%5Cred%7BE%7B%5Corange%7BR%20%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D" title="\huge\bold{\mathtt{\purple{A{\pink{ N{\green{S{\blue{W{\red{E{\orange{R }}}}}}}}}}}}}">... D)circumference / radius Step-by-step explanation: 100% correct answer Hope it's helpful ✌️✌️ $\huge\color{red}\boxed{\colorbox{black}{please\:mark\:me\: brilliance}}$ $\huge\underline\purple{\underline {Follow\:Me}}$

14.

In reference to a circle the value of pai is equal to A)area/circumference B)area/diameterC) Circumference/diameterD)circumference / radius

Answer» ALIGN="absmiddle" ALT="\huge\bold{\mathtt{\purple{A{\pink{ N{\green{S{\blue{W{\red{E{\ORANGE{R }}}}}}}}}}}}}" class="latex-formula" ID="TexFormula1" src="https://tex.z-dn.net/?f=%5Chuge%5Cbold%7B%5Cmathtt%7B%5Cpurple%7BA%7B%5Cpink%7B%20N%7B%5Cgreen%7BS%7B%5Cblue%7BW%7B%5Cred%7BE%7B%5Corange%7BR%20%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D%7D" title="\huge\bold{\mathtt{\purple{A{\pink{ N{\green{S{\blue{W{\red{E{\orange{R }}}}}}}}}}}}}">...

D)circumference / radius

Step-by-step explanation:

100% correct answer

Hope it's helpful ✌️✌️

$\huge\color{red}\boxed{\colorbox{black}{please\:mark\:me\: brilliance}}$

$\huge\underline\purple{\underline {Follow\:Me}}$

Discussion

15.	2x^2+56x-928=0 factorise it...
Answer» ONG>ANSWER: Hope the solution will be HELPFUL

Discussion

16.	3.19 The quadratic equation 16-012 (1-0)x+ (0-6)=0 hos equal rool, then show that_2b=a+c
Answer» ong>Answer: If roots of a QUADRATIC equation are equal, then discriminant of the quadratic equation is 0 D=B 2 −4ac=0 (b−c)x 2 +(c−a)x+(a−b)=0 Comparing with AX 2 +bx+c=0 Here, a=(b−c), b=(c−a) and c=(a−b) So, ⇒(c−a) 2 −4(b−c)(a−b)=0 ⇒c 2 +a 2 −2ac−4(ab−b 2 −ac+bc)=0 ⇒c 2 +a 2 −2ac−4ab+4b 2 +4ac−4bc=0 ⇒c 2 +a 2 +2ac+4b 2 −4ab−4bc=0 ⇒(c+a) 2 +4b 2 −4b(a+c)=0 ⇒(c+a) 2 +(2B) 2 −2(c+a)(2b)=0 ⇒[(c+a)−(2b)] 2 =0 ⇒c+a−2b=0 ⇒2b=c+a

16.

3.19 The quadratic equation 16-012 (1-0)x+ (0-6)=0 hos equal rool, then show that_2b=a+c

Answer»

ong>Answer:

If roots of a QUADRATIC equation are equal, then discriminant of the quadratic equation is 0

D=B

2

−4ac=0

(b−c)x

2

+(c−a)x+(a−b)=0

Comparing with

AX

2

+bx+c=0

Here, a=(b−c), b=(c−a) and c=(a−b)

So,

⇒(c−a)

2

−4(b−c)(a−b)=0

⇒c

2

+a

2

−2ac−4(ab−b

2

−ac+bc)=0

⇒c

2

+a

2

−2ac−4ab+4b

2

+4ac−4bc=0

⇒c

2

+a

2

+2ac+4b

2

−4ab−4bc=0

⇒(c+a)

2

+4b

2

−4b(a+c)=0

⇒(c+a)

2

+(2B)

2

−2(c+a)(2b)=0

⇒[(c+a)−(2b)]

2

=0

⇒c+a−2b=0

⇒2b=c+a

Discussion

17.	Find a quadratic polynomial each with the given no.a as teh sum and product of zeroes respectively: 1. 0,-9/42. -13/6,13. -2,8
Answer» ONG>ANSWER: Step-by-step EXPLANATION:

17.

Find a quadratic polynomial each with the given no.a as teh sum and product of zeroes respectively: 1. 0,-9/42. -13/6,13. -2,8

Answer» ONG>ANSWER:

Step-by-step EXPLANATION:

Discussion

18.	Find the area of a Circle whose Diameter is 150 m and radius is 20 m
Answer» > here is your answer hope it HELPS

18.

Find the area of a Circle whose Diameter is 150 m and radius is 20 m

Answer»

>

here is your answer

hope it HELPS

Discussion

19.	L + M whole square- 4 LM
Answer» ong>Answer: If we tak L - 12 M - 4 Again So 12 + 4 = 16 And 4 × 12 + 4 = 48 + 4 = 52 16 - 62 = 44 Hence, Answer is 44 PLEASE MARK ME AS A BRILLIANT

19.

L + M whole square- 4 LM

Answer»

ong>Answer:

If we tak

L - 12

M - 4

Again

So

12 + 4 = 16

And

4 × 12 + 4 = 48 + 4 = 52

16 - 62 = 44

Hence, Answer is 44

PLEASE MARK ME AS A BRILLIANT

Discussion

20.	Two dice were thrown at the same time. Find out what happened. The sum of the numbers on the upper side is a single number.
Answer» ong>Answer: Answer Open in answr app (i) 8 Total NUMBER of outcomes =36 Probability that SUM of two numbers is 8 =Total no. of outcomesNo. of outcomes where sum is 8 =365 (ii) LESS than or equal to 12 Total number of outcomes =36 Probability that sum of two numbers is less than or equal to 12 =Total no. of outcomesNo. of outcomes where sum is less than or equal to 12 =3636 =1

20.

Two dice were thrown at the same time. Find out what happened. The sum of the numbers on the upper side is a single number.

Answer»

ong>Answer:

Answer

Open in answr app

(i) 8

Total NUMBER of outcomes =36

Probability that SUM of two numbers is 8 =Total no. of outcomesNo. of outcomes where sum is 8

=365

(ii) LESS than or equal to 12

Total number of outcomes =36

Probability that sum of two numbers is less than or equal to 12 =Total no. of outcomesNo. of outcomes where sum is less than or equal to 12

=3636

=1

Discussion

21.	2xsquare plus 56x-928solve by factorisation method
Answer» Step-by-step explanation: 2x²+56x-928 Factor out 2 from the expression 2(x²+28x-464)

21.

2xsquare plus 56x-928solve by factorisation method

Answer»

Step-by-step explanation:

2x²+56x-928

Factor out 2 from the expression

2(x²+28x-464)

Discussion

22.	The two sides equations hide the question when ke is multiplied by 3 and the subtract from 10
Answer» ong>ANSWER: please say it clearly I can CLARIFY your DOUBT

22.

The two sides equations hide the question when ke is multiplied by 3 and the subtract from 10

Answer»

ong>ANSWER:

please say it clearly I can CLARIFY your DOUBT

Discussion

23.	7. Given the following data: VariableXYMean8098Variance49Coefficient of correlation =0.6What is the most likely value of y when x=90?
Answer» ong>Answer: obtain the MEAN of the following data VARIABLE xi 4 6 8 10 12 frequency fi 4 8 14 11 3 - Mathematics - TopperLearning.com ...

23.

7. Given the following data: VariableXYMean8098Variance49Coefficient of correlation =0.6What is the most likely value of y when x=90?

Answer»

ong>Answer:

obtain the MEAN of the following data VARIABLE xi 4 6 8 10 12 frequency fi 4 8 14 11 3 - Mathematics - TopperLearning.com ...

Discussion

24.	A=√2+1/√2-1 ,b=√2-1/√2+1 find a³-b³
Answer» ONG>Step-by-step EXPLANATION: jzjjzjzksjsjshdhdhdjuuuuuusvsjsvsoioevsozv

Discussion

25.	Find the answer by Euclids division method.
Answer» ong>Answer: Euclid's Division Algorithm is a technique to COMPUTE the Highest Common Factor (HCF) of two given positive INTEGERS. HCF of two positive integers a and B is the largest positive integer d that DIVIDES both a and b.

25.

Find the answer by Euclids division method.

Answer»

ong>Answer:

Euclid's Division Algorithm is a technique to COMPUTE the Highest Common Factor (HCF) of two given positive INTEGERS. HCF of two positive integers a and B is the largest positive integer d that DIVIDES both a and b.

Discussion

26.	Check whe ther given sides are the sides of right-angled triangles,using phytha go ras the orem.30,40,50
Answer» *PLEASE* *MARK* me as BRAIN LIST

Discussion

27.	RANKA DATEPAGE41] In each of the following determine numberbag and be6 to 13-1 = a br.13+1
Answer» ONG>Answer: nznzjzjzjshsjsbszjznnznznznznsnsnsndnsnsnsndndndnxnznnx you are INDIAN ARMY FANS

Discussion

28.	1. A cake recipe requires to cups of milk and 13 cups of four Write in sumptest form theratio of the number of cups of milk to thenumber of cups of four in this recipe (2)
Answer» ONG>Step-by-step explanation: 1 : 6.5 Hope it will HELP you

28.

1. A cake recipe requires to cups of milk and 13 cups of four Write in sumptest form theratio of the number of cups of milk to thenumber of cups of four in this recipe (2)

Answer» ONG>Step-by-step explanation:

1 : 6.5

Hope it will HELP you

Discussion

29.	birr 300 is ionvested at 6 simple interest per annum how log will it take for the interest to amount birr 180
Answer» ong>Answer: dhuf GFJ fjjf fgkb fj cn CCCC B

29.

birr 300 is ionvested at 6 simple interest per annum how log will it take for the interest to amount birr 180

Answer»

ong>Answer:

dhuf GFJ fjjf fgkb fj cn CCCC B

Discussion

30.	Ty Six) 2046. Verify that 1, 2 and 3/2 are the zeroes of the cubic polynomial p(x) = 2x3 - 9x3+13x-6 Then, verity the relationship between the zeroes and the coefficients of thepolynomial.
Answer» ONG>Answer: 3 ZEROS of the POLINOMIAL

Discussion

31.	The mean of a set of numbers is . If each number is multiplied by k, then find the mean of the new set.
Answer» ANSWER:- LET the original SUM be S. Let the no. Of terms be n. So, ATQ- x= S÷n---------1 New sum=kS So, new mean= kS÷n From 1------> kS÷S/x =kx

31.

The mean of a set of numbers is . If each number is multiplied by k, then find the mean of the new set.

Answer» ANSWER:-

LET the original SUM be S.

Let the no. Of terms be n.

So, ATQ-

x= S÷n---------1

New sum=kS

So, new mean= kS÷n

From 1------> kS÷S/x

=kx

Discussion

32.	Find the nature of the roots of the following quadratic equations. If the real roots exist, find them3x square - 4√3 x + 4=0
Answer» ong>Answer: i) x2−3x+5=0a=2,b=−3,c=5 Discriminant, D=b2−4ac=9−40=−31 Since D<0, the roots are imaginary for the GIVEN equation. ii) 3x2−43x+4=0a=3,b=−43,c=4 Discriminant, D=b2−4ac=48−48=0 Since D=0, the roots are REAL and equal for the given equation. 3x2−43x+4=0a=3,b=−43,c=4x=2a[−b±b2−4ac]x=643=32 iii) 2x2−6x+3

32.

Find the nature of the roots of the following quadratic equations. If the real roots exist, find them3x square - 4√3 x + 4=0

Answer»

ong>Answer:

i)

x2−3x+5=0a=2,b=−3,c=5

Discriminant, D=b2−4ac=9−40=−31

Since D<0, the roots are imaginary for the GIVEN equation.

ii)

3x2−43x+4=0a=3,b=−43,c=4

Discriminant, D=b2−4ac=48−48=0

Since D=0, the roots are REAL and equal for the given equation.

3x2−43x+4=0a=3,b=−43,c=4x=2a[−b±b2−4ac]x=643=32

iii)

2x2−6x+3

Discussion

33.	If a and b are the zeroes of the polynomial p(x) = x2 – x – k, such that a – b = 9, find a and b
Answer» ONG>Step-by-step EXPLANATION: x^2-(SUM of ROOTS)x+product of roots a+b=1 a-b=9 2a=10 a=5 b=-4 k=20

33.

If a and b are the zeroes of the polynomial p(x) = x2 – x – k, such that a – b = 9, find a and b

Answer» ONG>Step-by-step EXPLANATION:

x^2-(SUM of ROOTS)x+product of roots

a+b=1

a-b=9

2a=10

a=5

b=-4

k=20

Discussion

34.	The international date line is also called____in short
Answer» can SEE that the WHOLE of a SUDDEN and ELIJAH

Discussion

35.	Show that the angles of an equilateral triangle are 60° each.
Answer» ER: Step-by-step explanation: We KNOW that, angles in an equilateral ∆ are all equal So, let each ANGLE be X By angle sum property, x + x + x = 180 3x = 180 x = 180/3 x = 60 Hence, proved

35.

Show that the angles of an equilateral triangle are 60° each.

Answer» ER:

Step-by-step explanation:

We KNOW that, angles in an equilateral ∆ are all equal

So, let each ANGLE be X

By angle sum property,

x + x + x = 180

3x = 180

x = 180/3

x = 60

Hence, proved

Discussion

36.	The length of diagonal of a cuboid is 10cm and sum of its length,breadth,and height is80 cm. Find the total surface area of the cuboid. answer is 6300 m but why???
Answer» ong>GIVEN: Diagonal of a cuboid = 10cm Sum of its length,breadth,and HEIGHT = 80 cm To FIND: The total surface area of the cuboid.? Solution: • Let's consider l + b + h = 80 …(i) as equation (i). Where, Hypotenuse = Diagonal = 10cm Base = Length Perpendicular = Height ⠀⠀━━━━━━━━━━━━━━━━━━━⠀ « Now, By using PYTHAGORAS Theorem, √l² + b² + h² = (10)² → l² + b² + h² = 100 ...(ii) Using ...(i), l + b + h = 80 « On squaring both sides, we have, l + b + h = 80 → (l + b + h)² = (80)² → l² + b² + h² + 2 (lb + bh + hl) = 6400 → 100 + 2 (lb + bh + hl) = 6400 → 2 (lb + bh + hl) = 6400 - 100 → 2 (lb + bh + hl) = 6300 ⠀⠀━━━━━━━━━━━━━━━━━━━⠀ Formula of total surface area is 2 (lb + bh + hl) . ∴ Hence, Total surface area of the cuboid is 6300cm.

36.

The length of diagonal of a cuboid is 10cm and sum of its length,breadth,and height is80 cm. Find the total surface area of the cuboid. answer is 6300 m but why???

Answer»

ong>GIVEN:

Diagonal of a cuboid = 10cm
Sum of its length,breadth,and HEIGHT = 80 cm

To FIND:

The total surface area of the cuboid.?

Solution:

• Let's consider l + b + h = 80 …(i) as equation (i).

Where,

Hypotenuse = Diagonal = 10cm
Base = Length
Perpendicular = Height

⠀⠀━━━━━━━━━━━━━━━━━━━⠀

« Now, By using PYTHAGORAS Theorem,

√l² + b² + h² = (10)²

→ l² + b² + h² = 100 ...(ii)

Using ...(i), l + b + h = 80

« On squaring both sides, we have,

l + b + h = 80

→ (l + b + h)² = (80)²

→ l² + b² + h² + 2 (lb + bh + hl) = 6400

→ 100 + 2 (lb + bh + hl) = 6400

→ 2 (lb + bh + hl) = 6400 - 100

→ 2 (lb + bh + hl) = 6300

⠀⠀━━━━━━━━━━━━━━━━━━━⠀

Formula of total surface area is 2 (lb + bh + hl) .

∴ Hence, Total surface area of the cuboid is 6300cm.

Discussion

37.	How many crores in 72447400000?
Answer» ONG>Answer: 1000 crores Step-by-step EXPLANATION:

37.

How many crores in 72447400000?

Answer» ONG>Answer:

1000 crores

Step-by-step EXPLANATION:

Discussion

38.	Solve. 4 cos3 45°3 cos 40 tsin 45°
Answer» Step-by-step EXPLANATION: MARK ME AS THE BRAINLIEST

38.

Solve. 4 cos3 45°3 cos 40 tsin 45°

Answer»

Step-by-step EXPLANATION:

MARK ME AS THE BRAINLIEST

Discussion

39.	If (cos theta +sin theta),prove that (cos theta -sin theta)=+-1
Answer» ONG>Answer: 1 Step-by-step EXPLANATION: Life won’t GET easier. You just have to get STRONGER

39.

If (cos theta +sin theta),prove that (cos theta -sin theta)=+-1

Answer» ONG>Answer:

1

Step-by-step EXPLANATION:

Life won’t GET easier. You just have to get STRONGER

Discussion

40.	the measure of the angels of triangle are in AP. The smallest angel is 40degress.find the angel of the triangle in degree and in radians
Answer» ONG>ANSWER: a=40 common DIFFERENCE =d 40+ 40+d+40+2d= 180 3d=60 d=20 angles are 60 and 80 in radiands 60× pi/180= pi/3 80×pi/180= 4pi/9

40.

the measure of the angels of triangle are in AP. The smallest angel is 40degress.find the angel of the triangle in degree and in radians

Answer» ONG>ANSWER:

a=40

common DIFFERENCE =d

40+ 40+d+40+2d= 180

3d=60

d=20

angles are 60 and 80

in radiands 60× pi/180= pi/3

80×pi/180= 4pi/9

Discussion

41.	He accepted the assignment. ( change the voice/start with 'the assignment' )
Answer» ONG>ANSWER: ASSIGNMENT was ACCEPTED by him.

Discussion

42.	Express in p/q form given below
Answer» rong>➲QUESTION : Express in p/q form : $\sf2.44 \bar{3} \bar{1}$ ☯ GIVEN : $\bf {<klux>2</klux>.44 \bar 3 \bar 1}$ . ☯ TO FIND : p/q form of $\bf {2.44 \bar3 \bar1}$ . ➲SOLUTION : Let $\tt{x = 2.44 \bar 3 \bar 1\: \: \:<klux>EQ</klux> (1)}$ By Multiplying 100 in eq(1) on both sides : $\tt{100x = 244 .\bar 3 \bar 1\: \: \: eq(2)}$ By Multiplying 100 in EQUATION (2) on both sides : $\tt{10000x = 244 31.\bar3 \bar 1\: \: \: eq(3)}$ By subtracting equation (2) from equation (3) : $\implies{ \sf{10000x -100x = 244 31.\bar3 \bar1 - 244 .\bar 3 \bar1 }} \\ \\$ $\implies{ \sf{9900 x = 24187}} \\ \\$ $\implies\underline {\pink{\boxed { \bf{ x= {\dfrac{24187}{9900} }}}}}$ $\huge {\green{\therefore}}$ p/q form of $\sf {2.44 \bar3 \bar1}$ = $\bf{\dfrac{24187}{9900}}$

42.

Express in p/q form given below

Answer»

rong>➲QUESTION :

Express in p/q form : $\sf2.44 \bar{3} \bar{1}$

☯ GIVEN :

$\bf {<klux>2</klux>.44 \bar 3 \bar 1}$ .

☯ TO FIND :

p/q form of $\bf {2.44 \bar3 \bar1}$ .

➲SOLUTION :

Let

$\tt{x = 2.44 \bar 3 \bar 1\: \: \:<klux>EQ</klux> (1)}$

By Multiplying 100 in eq(1) on both sides :

$\tt{100x = 244 .\bar 3 \bar 1\: \: \: eq(2)}$

By Multiplying 100 in EQUATION (2) on both sides :

$\tt{10000x = 244 31.\bar3 \bar 1\: \: \: eq(3)}$

By subtracting equation (2) from equation (3) :

$\implies{ \sf{10000x -100x = 244 31.\bar3 \bar1 - 244 .\bar 3 \bar1 }} \\ \\$

$\implies{ \sf{9900 x = 24187}} \\ \\$

$\implies\underline {\pink{\boxed { \bf{ x= {\dfrac{24187}{9900} }}}}}$

$\huge {\green{\therefore}}$ p/q form of $\sf {2.44 \bar3 \bar1}$ = $\bf{\dfrac{24187}{9900}}$

Discussion

43.	Which is the correct zero of polynomial x²−x−6 a -3 b 2 c both a and b d none of above
Answer» ONG>Answer: -3 is THA answer for the POLYNOMIAL

Discussion

44.	8. Calculate Mean , Median & Mode from the following distributionClass intervalfrequency५०-५५35-39и30-034сиси25-2920-241515-1910-14NSEN = go
Answer» ong>Answer: baby .. mama MO akhi ru mo nida chadeiki neigalani !! SAALA phone jama b dauni !! Olya baba knu phone karidauchi !! PUNI baba raguchanti ☹️.. hau baby ☺️☺️ love you ❤️❤️ ummmmmmmmmmaaaa ☺️☺️❤️ ummmmmmmmmmaaaa ❤️❤️☺️ Wanna to ❤️❤️ WILDLY ❤️❤️

44.

8. Calculate Mean , Median & Mode from the following distributionClass intervalfrequency५०-५५35-39и30-034сиси25-2920-241515-1910-14NSEN = go

Answer»

ong>Answer:

baby .. mama MO akhi ru mo nida chadeiki neigalani !! SAALA phone jama b dauni !! Olya baba knu phone karidauchi !! PUNI baba raguchanti ☹️..

hau baby ☺️☺️ love you ❤️❤️

ummmmmmmmmmaaaa ☺️☺️❤️

ummmmmmmmmmaaaa ❤️❤️☺️

Wanna to ❤️❤️ WILDLY ❤️❤️

Discussion

45.	the difference between simple interest and compound interest on a certain amount of money for 4years 10% per annum is Rs.320.50 the sum of the money
Answer» ER of this QUESTION is given in image I hope you are ABLE to understand answer

45.

the difference between simple interest and compound interest on a certain amount of money for 4years 10% per annum is Rs.320.50 the sum of the money

Answer» ER of this QUESTION is given in image

I hope you are ABLE to understand answer

Discussion

46.	2. Divide 10x2+ 29xy -21y2 by 2x+Zy?
Answer» ONG>Step-by-step EXPLANATION: please GIVE me THANKS and mark me brilient ☺️

Discussion

47.	Please answer me fastit's very urgentplease
Answer» ONG>Step-by-step EXPLANATION: सॉरी आई कैन डू इट प्लीज आस्क समवन अवंतिका सचिव रविशंकर डॉट कॉम प्लीज

Discussion

48.	4. The value of sin 60° × cos30° is
Answer» ONG>Answer: hope it will be helpful MARK me BRAINLIEST and... FOLLOW

48.

4. The value of sin 60° × cos30° is

Answer» ONG>Answer:

hope it will be helpful

MARK me BRAINLIEST and...

FOLLOW

Discussion

49.	Evaluate :(i) 20 – ( -11)
Answer» ONG>Answer: *<U>Hope it helps!! Mark this answer as BRAINLIEST if u found it useful and FOLLOW* me for quick and accurate answers... Step-by-step EXPLANATION: $20 - ( - 11) \\ \\ 20 + 11 \\ \\ 31$

49.

Evaluate :(i) 20 – ( -11)

Answer» ONG>Answer:

<U>Hope it helps!! Mark this answer as BRAINLIEST if u found it useful and FOLLOW me for quick and accurate answers...

Step-by-step EXPLANATION:

$20 - ( - 11) \\ \\ 20 + 11 \\ \\ 31$

Discussion

50.	P 머Things that appearsilver in the moonlight
Answer» ong>Answer: The trees with their fruits, the windows under the thatched roofs, the PAWS of a dog fast asleep, the FEATHERS of doves in their shady NESTS, the claws and EYE of a harvest mouse and the reeds in a stream where a fish lies motionless—turn into silver in the light of the moon.

50.

P 머Things that appearsilver in the moonlight

Answer»

ong>Answer:

The trees with their fruits, the windows under the thatched roofs, the PAWS of a dog fast asleep, the FEATHERS of doves in their shady NESTS, the claws and EYE of a harvest mouse and the reeds in a stream where a fish lies motionless—turn into silver in the light of the moon.

Discussion

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