Question

The diameter and height of a right circular cone are $6\text{cm}$ and $4\text{cm}$ respectively. Find its volume.

Answer 1

Diameter$D=6\text{cm}$

Radius$=\frac{6}{2}=3\text{cm}$

Height$h=4\text{cm}$

Volume$=\frac{1}{3}\pi r^{2}h$

$=\frac{1}{3}\times \frac{22}{7}\times 3\times 3\times 4{\text{cm}}^3$

$=\frac{22\times 3\times 4}{7}{\text{cm}}^3$

$=\frac{264}{7}{\text{cm}}^3$

$=37.71{\text{cm}}^3$