The height of a right circular cylinder is 10.5 m. Three times the sum of the area of its two circular faces is twice the area of the curved surface. Find the volume of the cylinder.

Explanation

Height of a right circular cylinder, `h=10.5m`

A.T.Q

`3×sum of areas of two circular faces =2×area of curved surface`

`3xx2pir^2=2xx2pirh` (Area of circular face = `pir^2` and `C.S.A =2pirh`)

`6pir^2=4pirh`

`3r=2h`

`r=(2xx10.5)/3`

`r=7m`

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