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The perimeter of a sector of a circle of radius 14 cm and angle 90 degrees is
A50 cm
B44 cm
C22 cm
D28 cm
Answer & Solution
Correct answer: A. 50 cm
1. Perimeter = arc + 2 × radius = (90/360) × 2 × (22/7) × 14 + 2 × 14.
2. = (1/4) × 88 + 28 = 22 + 28.
3. Hence 50 cm.
_Source: NCERT Class 10 Mathematics, Ch 11 "Areas Related to Circles", §11.2_
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