We know the formula for the volume and the only variable we do not know is the radius (2r=diameter)
Therefore by isolating r and multiplying it by 2, we will find tge diameter
V= (h(pi)r^2)/3
320(pi)=(20(pi)r^2)/3
3*320(pi)=20(pi)r^2
960/20=r^2
48=r^2
Sqrt(48)=r
Diameter = 2(sqrt48)
