A right triangle with sides 3 cm, 4 cm and 5 cm is rotated

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A right triangle with sides 3 cm, 4 cm and 5 cm is rotated about the side 3 cm to form a cone, The volume of the cone so formed is

1. 16 π cm³
2. 12 π cm³
3. 15 π cm³
4. 20 π cm³

Correct Option: A

Clearly, r = 4 cm, h = 3cm.

∴ Volume of cone =	1	πr²h
	3

=	1	π × 16 × 3 = 16π cm³
	3