SSC CHSL 6 Dec 2015 Shift 1 Paper

Question : 108 of 200

Marks: +1, -0

A right triangle with sides 9 cm, 12 cm and 15 cm is rotated about the side of 9 cm to form a cone. The volume of the cone so formed is:

Solution:

Clearly, we have radius r = 9 cm and height h = 12cm
Volume of cone =

1/3πr^2h

1/3π×(9)^2×12

81 × 4 × π = 324π cm^3

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