Exams › SSC CGL (Prelims) › General

A sector of a circle has radius 12 cm and a central angle of pi/5 radians. What is its area?

1. 30.16 cm^2
2. 45.24 cm^2
3. 60.48 cm^2
4. 75.6 cm^2

Correct answer: 45.24 cm^2

Solution

Sector area in radians is (1/2)r^2 theta = (1/2)(144)(pi/5) = 14.4 pi ≈ 45.24 cm^2.

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