Volume of a cone with radius 6 cm and height 21 cm is

Concept: Volume of right circular cone is given by:

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

Given: r = 6 cm and h = 21 cm

Therefore,

$\Rightarrow V=\frac{1}{3}\pi {\left(6\right)}^2.21$

$\Rightarrow \frac{1}{3}\times \frac{22}{7}\times 36\times 21=22\times 12\times 3$

$\Rightarrow 792 c{m}^3$

Hence, volume of cone is $792 c{m}^3$.