Question

The volume of a cylinder is 225pi in.Cubed and the height of the cylinder is 1 in. What is the radius of the? cylinder?

Answer 1

r = 15 in

Explanation:

The formula of a volume of a cylinder:

`V=\pi r^2H`

r - radius

H - height

We have

`V=225\pi in^3\\\\H=1\ in`

Substitute:

`225\pi=\pi r^2(1)` divide both sides by π

`225=r^2\to r=√(225)\\\\r=15\ in`