Question 759158
volume of cylinder = pi *r^2*h=80 cc (where r=radius,h=height & d=diameter)
now as given new cylinder wil have
D=4/5d or R=4/5r
& H=4/5h
so the volume = pi*R^2*H=pi*(4/5r)^2*(4/5h)=pi *16/25r^2*4/5h
=pi *r^2*h*(16*4/25*5)=80*64/125=40.96cc