Question

A right triangle with side 9 ,12,15 cm is rotsted about the side 9 to form cone find volume

Answer 1

Smallest side is 9 and it is base of triangle when this triangle is roasted it forms a cone of

base diameter = 9cm

Height of cone = 12cm

$volume \: of \: cone = \frac{1}{3} \pi {r}^{2} h$

$= > \frac{22}{7} \times \frac{9}{2} \times \frac{9}{2} \times 12$

$= > \frac{22}{7} \times 81 \times 3$

$= > \frac{5346}{7}$

$= > 763.71 {cm}^{3}$