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Question

Radii of the top and the base of a frustum are 12 cm, 6 cm respectively. Its height is 8 cm. Then the volume of the frustum is _____cm3. (Use =π=227)

A
1200
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B
1508
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C
2112
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D
2715
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Solution

The correct option is C 2112
Given, Radii of the frustum of the cone r1=12 cm
r2=6 cm
Height of the frustum of the cone h = 8 cm

Volume of the frustum of the cone =13 π h (r21+r22+r1r2)
=13×227×(8)×(122+62+(12)(6))
=2112 cm3

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