Exams › SSC CGL (Prelims) › General

Calculate the volume (in cm^3, rounded to 2 decimal places) of a right circular cone whose diameter is 12 cm and height is 5 cm. (Use pi = 22/7)

1. 197.25
2. 156.39
3. 188.57
4. 147.23

Correct answer: 188.57

Solution

Radius = 12/2 = 6 cm. Volume = (1/3)(22/7)(6^2)(5) = (1/3)(22/7)(36)(5) = (22 x 60)/7 = 1320/7 = 188.57 cm^3. The other options result from using wrong values of radius or incorrect formulas.

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