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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:

12Π cm3
15Π cm3
16Π cm3
20Π cm3

Correct Answer: 12Π cm3

Explanation:

Clearly, we have r = 3 cm and h = 4 cm.

∴ Volume =	1	Πr²h =	❨	1	x Π x 3² x 4	❩cm³	= 12Π cm³.
	3			3

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