alleryవ్యాసార్థం 21 cm వృత్తాకార రంగం చుట్టుకొలత 86 cm. దాని ప్రాంతాన్ని కనుగొనండి; π = 22/7ని ఉపయోగించండి.
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
ఆర్క్ 86−2×21 = 44 cm, 44/132×360° =120°;
ప్రాంతం 120/360×(22/7)×21² =462 cm²
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