Exams › SSC CGL (Prelims) › General

The volume of a hemisphere is 19,404 cm^3. What is the radius of the hemisphere?

1. 14 cm
2. 19 cm
3. 21 cm
4. 17 cm

Correct answer: 21 cm

Solution

Using V = (2/3)(22/7)r^3 = 19404: r^3 = 19404 * 21 / 44 = 9261, so r = 21 cm. Verification: (2/3)(22/7)(21^3) = (2/3)(22/7)(9261) = 19404.

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