SOLUTION: A water tank is in the shape if a right circular cylinder with a height if 20 feet and a volumeif 320 (pie) cubic feet. What is the diameter, in feet of the tank?

Algebra ->  Volume -> SOLUTION: A water tank is in the shape if a right circular cylinder with a height if 20 feet and a volumeif 320 (pie) cubic feet. What is the diameter, in feet of the tank?      Log On


   

Question 826978: A water tank is in the shape if a right circular cylinder with a height if 20 feet and a volumeif 320 (pie) cubic feet. What is the diameter, in feet of the tank?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A water tank is in the shape if a right circular cylinder with a height if 20 feet and a volume if 320 (pie) cubic feet.
What is the diameter, in feet of the tank?
:
The volume of a cylinder: V = pi%2Ar%5E2%2Ah
This problem
pi%2Ar%5E2%2A20 = 320%2Api
divide both sides by pi
20r^2 = 320
r^2 = 320%2F20
r^2 = 16
r = sqrt%2816%29
r = 4, the diameter is 8 ft obviously