Question

The thikness of a hollow metalic cylinder is 2 cm it is 35cm long and its inner radius is 12cm find the volume of a metel required to make the cylinder assuming open at either end .

Answer 1

Volume of wood required

Pie*r2*h – Pie*R2*h



Where r and R are the outer and internal radii respectively.

R = 12cm and r = 14cm



Volume of wood

Pie*142*35 – Pie*122*35



= 5720 cm2