[12 cm^3] A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volu

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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$\pi cm^3$.

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