"If the radius of the base and height of a cylinder and cone are each equal to `r`, and
Channel: Doubtnut
Date: 05/04/2020

"If the radius
 of the base and height of a cylinder and cone are each equal to `r`
, and the
 radius of a hemisphere is also equal to `r`
, then the
 volumes of the cone, cylinder and hemisphere are in the ratio
(a) 1 : 2 :
 3 (b) 1 : 3 : 2 (c) 2 : 1 : 3 (d) 3 : 2 : 1"