alleryत्रिज्या 21 cm परिमिती 86 cm आहे. त्याचे क्षेत्र शोधा; π = 22/7 वापरा.
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
चाप 86−2×21 = 44 सेमी आहे, कोन देतो 44/132×360° =120°;
क्षेत्रफळ आहे 120/360×(22/7)×21² =462 cm².
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