# Math Help - volume of a cylinder tank, help please

1. ## volume of a cylinder tank, help please

The volume of a cylindrical tank is given by the formula V=pieh r^2 where h is the height of the cylinder and r is its radius. Find the volume to the nearest tenth of a cubic foot, radius is 3 feet and height is 5 feet.
so r is two times the feet, 3x2x5=30 cu,ft, this I think is wrong or I'm missing something. thanks for helping and checking.

2. Originally Posted by kwtolley
The volume of a cylindrical tank is given by the formula V=pieh r^2 where h is the height of the cylinder and r is its radius. Find the volume to the nearest tenth of a cubic foot, radius is 3 feet and height is 5 feet.
so r is two times the feet, 3x2x5=30 cu,ft, this I think is wrong or I'm missing something. thanks for helping and checking.
You are told that:

V= pi h r^2,

also that the radius r=3 ft, and height h=5 ft, so:

V = pi 5 3^2=pi 45 ~=3.1416 45= 141.37 cubic ft.

RonL

3. ## thanks

I see where I was way off, thanks this will help me withthe rest I have to do.