Q. A cylinder has the same radius and height. If its radius is doubled, keeping the height unchanged, the curved surface area becomes:

(A) 2 times
(B) 3 times
(C) 4 times
(D) 8 times

✅ Correct Answer: (A) 2 times

Explanation: CSA = 2πrh. With constant height, doubling r doubles CSA.

Published by Mr. Dubey ⭐ 109.12K Points at 15-Jul-2026 06:29 am in Math

Explanation by: Mr. Dubey

CSA = 2πrh. With constant height, doubling r doubles CSA.

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