Answer :
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
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