A circular arc whose radius is 12 cm makes an angle of 30° at the center. Find the perimeter (in cm) of the sector formed. (Use π = 3.14)
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Correct answer: B
Explanation
The correct answer is option 2 i.e. 30.28.
Length of the arc = θ/360° × 2πr
= 30°/360° × 2 × 3.14 × 12
= 6.28
The perimeter of the sector = Length of the Arc + 2r = 6.28 + 24 = 30.28 cm