allery7 सेंमी त्रिज्या आनी 5 सेंमी. (पीआय = 22/7)
A154 चौरस सेंमी
B440 चौरस सेंमी
C110 चौरस सेंमी
D220 चौरस सेंमी
Answer & Solution
Correct answer: D. 220 चौरस सेंमी
वक्र क्षेत्रफळ 2 pi r h = 2 x 22/7 x 7 x 5 = 220 चौरस सेंमी.
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