alleryA circular sector of radius 21 cm has perimeter 86 cm. Find its area; use π = 22/7.
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
The arc is 86−2×21 = 44 cm, giving angle 44/132×360° =120°; area is120/360×(22/7)×21² =462 cm².
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