The thickness of a hollow wooden cylinder is 2cm. It is 35cm long and its inner radius is 12cm. Find the volume of the wood required to make the cylinder, assuming it is open at either end.

Explanation

Volume=total volume-volume of inner cylinder

Volume of cylinder`=pir^2hcm^3`

`piR^2h-pir^2h`

`pih(R^2-r^2)`

`22/7*35(14^2-12^2)`

`5720cm^3`.