Find the volume of frustum of cone the radius of its two ends are 3cm and 5 cm and its height is 12cm
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Volume of frustum = 1/3 πh(r1^2 +r2^2 + r1r2)
=1/3*22/7*12(3^2+5^2+5*3)
=22/7*4(49)
=22*4*7
=88*7
=216cm^3
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