allerypi ને 22/7 તરીકે લેતાં, 7 cm ત્રિજ્યા ધરાવતા વર્તુળનું ક્ષેત્રફળ કેટલું થાય?
A154 cm²
B49 cm²
C44 cm²
D308 cm²
Answer & Solution
Correct answer: A. 154 cm²
વર્તુળનું ક્ષેત્રફળ pi r નો વર્ગ છે, તેથી (22/7) x 49 = 154 ચોરસ સેન્ટીમીટર.
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