allerypi = 22/7 मानल्यास, 7 cm त्रिज्या असलेल्या वर्तुळाचे क्षेत्रफळ किती?
A154 cm²
B49 cm²
C44 cm²
D308 cm²
Answer & Solution
Correct answer: A. 154 cm²
वर्तुळाचे क्षेत्रफळ pi r वर्ग असते, म्हणून (22/7) x 49 = 154 चौरस सेंटीमीटर.
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