Question

The diameter of the base of a right circular cylinder is 42cm and its height is 10 cm. Find the volume of the cylinder.

Answer 1

Diameter of the base of cylinder = 42cm
$\therefore$ Radius(r) = $\frac{42}{2}=21cm$
Height(h) =10cm
$\therefore$ Volume = $\pi r^{2}h$ = $\frac{22}{7}\times (21{)}^2\times 10c{m}^3$
$\frac{22}{7}\times 21\times 21\times 10=13860c{m}^3$