A sphere is placed inside a right circular cylinder so as to touch the top, base and lateral surface of the cylinder. If the radius of the sphere is `r ,` then the volume of the cylinder is `4pi\ r^3` (b) `8/3pi\ r^3` (c) `2pi\ r^3` (d) `8pi\ r^3`

Explanation

Radius of sphere,`=r`
Volume`=4/3pir^3`
Radius of cylinder `=R=r`
Height `(h) =2r`
Volume `=piR^2h`
`=pir^2xx2r=2pir^3`