A right triangle with sides 3cm,4cm and 5cm is rotated about the side of 3cm to form a cone. The volume of the cone so formed is
(a) 12πcm^3
(b). 15πcm^3
(c). 16πcm^3
(d). 20 πcm^3
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Answer is = 12πcm^3
Volume of cone is 1/3πr^2h
1/3 x π x 3^2 x 4
1/3 x π x 9 x 4
36/3π = 12πcm2
Volume of cone is 1/3πr^2h
1/3 x π x 3^2 x 4
1/3 x π x 9 x 4
36/3π = 12πcm2
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