A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is:
$12 cm^3 $
$15 cm^3$
$16 cm^3$
$20 cm^3$
Explanation:
Clearly, we have r = 3 cm and h = 4 cm.
ஃ Volume = $\dfrac{1}{3} \pi r^2h = (\dfrac{1}{3} \times pi \times 3^2)cm^3$ = 12$\pi cm^3$.
Clearly, we have r = 3 cm and h = 4 cm.
ஃ Volume = $\dfrac{1}{3} \pi r^2h = (\dfrac{1}{3} \times pi \times 3^2)cm^3$ = 12$\pi cm^3$.