A right triangle with sides 3 cm, 4 cm and 5 cm is rotated about the side of 3 cm to form a cone. The volume of the cone so formed is
Choose the correct choice:
A) 12Π cm3	B) 15Π cm3	C) 16Π cm3	D) 20Π cm3	E) None
Solution   Clearly, we have r = 3cm and h = 4cm.   ∴ Volume	= 1/3Πr2h   = (1/3 x Π x 32x4)cm3   = 12Πcm3.   12Π cm3nswer 12Π cm3
<result>A</result>
A right triangle with sides 3 cm, 4 cm and 5 cm is rotated about the side of 3 cm to form a cone. The volume of the cone so formed is