alleryπ का मान 22/7 लेते हुए, 7 cm त्रिज्या वाले वृत्त का क्षेत्रफल क्या होगा?
A154 cm²
B49 cm²
C44 cm²
D308 cm²
Answer & Solution
Correct answer: A. 154 cm²
वृत्त का क्षेत्रफल πr² होता है, इसलिए (22/7) × 49 = 154 वर्ग सेंटीमीटर (cm²)।
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