Question

A water tank is in the shape of a right circular cylinder with a height of 20 feet volume of 320pi cubic feet. what is the diameter, in feet, of the water tank

Answer 1

V=hpir^2

given
v=320pi
h=20
and
2r=d


320pi=20pir^2
divide both sides by 20pi
16=r^2
sqrt both sides
4=r


2r=d
2(4)=d=8

dameter=8ft