The radius of the base of a right circular cone is 21 cm and its height is 20 cm. Find its volume.
A
3300cm2
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B
1914cm2
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C
1386cm2
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D
26720cm2
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Solution
The correct option is B1914cm2 Given: Radius of the cone, r = 21 cm Height of the cone, h = 20 cm Volume of cone = 13πr2h = 13×227×21×21×20 = 22×21×20 = 9240cm3