SOLUTION: a water tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320 pi cubic feet. What is the diameter,in feet, of the water tank?

Algebra ->  Volume -> SOLUTION: a water tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320 pi cubic feet. What is the diameter,in feet, of the water tank?      Log On


   

Question 864548: a water tank is in the shape of a right circular cylinder with a height of 20 feet and a volume of 320 pi cubic feet. What is the diameter,in feet, of the water tank?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

.

V =pi%2A%28r%5E2%29+h+=+320pift%5E3

V =pi%2A%28r%5E2%29+10ft+=+320pift%5E3

               r^2 =  320/20

               r^2 = 16

                r = 4ft,  Diameter is 8ft