alleryएक वर्तुळाकार कडे 21 cm आणि 14 cm त्रिज्या असलेल्या वर्तुळांनी बद्ध आहे. त्याचे क्षेत्रफळ काढा (pi = 22/7).
A1078 cm²
B770 cm²
C308 cm²
D462 cm²
Answer & Solution
Correct answer: B. 770 cm²
कड्याचे क्षेत्रफळ = π(21² - 14²) = (22/7)(245) = 770 cm² आहे.
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