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

Question:

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

Solution:

Given :

Diameter, $d=42 \mathrm{~cm}$

Radius, $r=\frac{d}{2}=21 \mathrm{~cm}$

Height, $h=10 \mathrm{~cm}$

Volume of the cylinder, $\mathrm{V}=\pi r^{2} h$

$=\frac{22}{7} \times 21^{2} \times 10$

$=13860 \mathrm{~cm}^{3}$

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