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3 years ago

How do you find the radius of a cylinder when you only know the surface area?

1 answer:

7 0

The surface area of a cylinder with circular bases of radius r and height h is equal to the sum of the areas of the two circular faces and the area of the rectangular lateral surface:

A = 2πr² + 2πrh

If you know the height h, then you can solve the quadratic equation for r.

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2 years ago

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3 years ago

Find the volume of the sphere. express your answer in term of Pie

IceJOKER [234]

Answer:

$\large\boxed{36\pi}$

Step-by-step explanation:

The formula of a volume of a sphere:

$V=\dfrac{4}{3}\pi R^3$

R - radius

We have R = 3 ?. Substitute

$V=\dfrac{4}{3}\pi(3^3)=\dfrac{4}{3}\pi(27)=(4)\pi(9)=36\pi$

If the radius is 30, then the volume is:

$V=\dfrac{4}{3}\pi(30^3)=\dfrac{4}{3}\pi(27,000)=(4)\pi(9,000)=36,000\pi$

If 30 is the length of diameter, then the radius R = 30 : 2 = 15.

Therefore the volume:

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3 years ago

Angles 2 and angle 7 are ??? angles

MatroZZZ [7]

Answer:

D alternate exterior angle

Step-by-step explanation:

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3 years ago

Read 2 more answers

Iven 5 different letters, how many different ways can you arrange 3 of them (whether they spell a word or not)

nevsk [136]

Permutation so 5!/(5-3)!=5!/2!= 5 x 3 x 4= 60 ways.

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3 years ago