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एक वृत्त का क्षेत्रफल 154 वर्ग सेमी है (π = 22/7)। इसका व्यास क्या है?

A22 cm
B14 cm
C7 cm
D28 cm
Answer & Solution
Correct answer: B. 14 cm
त्रिज्या का वर्ग (r²) = 154 × 7/22 = 49 है, इसलिए त्रिज्या = 7 cm तथा व्यास = 2 × 7 = 14 cm।
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