एका वर्तुळाचे क्षेत्रफळ 154 sq cm आहे (pi = 22/7). त्याचा व्यास किती आहे?
A22 cm
B14 cm
C7 cm
D28 cm
Answer & Solution
Correct answer: B. 14 cm
त्रिज्येचा वर्ग 154 x 7/22 = 49 आहे, म्हणून त्रिज्या 7 cm आणि व्यास 14 cm आहे.
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