alleryत्रिज्या r और ऊंचाई h वाले एक लंब बेलन के वक्र पृष्ठ का क्षेत्रफल किस सूत्र द्वारा दिया जाता है?
Api * r^2
B2pi * r * h
Cpi * r^2 * h
D4pi * r^2
Answer & Solution
Correct answer: B. 2pi * r * h
एक लंब बेलन का वक्र पृष्ठीय क्षेत्रफल 2 * pi * r * h द्वारा दिया जाता है।
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