alleryत्रिज्या r वाले गोले के कुल बाह्य पृष्ठीय क्षेत्रफल की गणना किस बीजगणितीय व्यंजक द्वारा की जाती है?
A2pi * r^2
B4pi * r^2
C(4/3)pi * r^3
D(2/3)pi * r^3
Answer & Solution
Correct answer: B. 4pi * r^2
त्रिज्या r वाले गोले का पृष्ठीय क्षेत्रफल 4 * pi * r^2 द्वारा दिया जाता है।
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