Question

if the diameter of a cylinder is half then find the ratio between the volume of new and the old one?

Answer 1

let the diameter is 2r
then the volume of cylinder is pi(r)sq.h
now diameter is 2r/2=r
then the volume is pi(r/2)sq.h
ratio=pi (r/2)sq.h/pi (r)sq.h
ratio=1/4