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એક વર્તુળનું ક્ષેત્રફળ 154 sq cm છે (pi = 22/7). તેનો વ્યાસ કેટલો થશે?

A22 cm
B14 cm
C7 cm
D28 cm
Answer & Solution
Correct answer: B. 14 cm
ત્રિજ્યાનો વર્ગ 154 x 7/22 = 49 છે, તેથી ત્રિજ્યા 7 cm અને વ્યાસ 14 cm થાય છે.
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