radius= r/2
height= 2h
volume of cylinder = pie x r^2 x h
= pie x (r/2)^2 x 2h
= pie x( r2/)^2 x h
hence volume will be halved
If the radius of a cylinder is doubled and height is halved find the change in the volume.
In cylinder, if the radius is halved and the height is doubled then the volume will be
(a) the same (b) doubled (c) halved (d) four times
If the height of a cylinder is doubled and radius remains the same, then volume will be
(a) doubled (b) halved
(c) same (d) four times