radius of a cylinder

[easilyconfuzzeled]

A cylinder has a volume of 320 pi cu. in. and a height of 5". Find the radius of the cylinder.

I have no idea what im doing here...i was doing great on my homework till i go to this question and now im confused. please help :wink:

 

[galactus]

The volume of a cylinder is $\displaystyle V={\pi}r^{2}h$

You are given V amd h. Enter them in and solve for r.