Q. If the radius of a cylinder is doubled and the curved surface area remains unchanged, the height becomes:

  • (A) Double
  • (B) Half
  • (C) One-fourth
  • (D) Four times
✅ Correct Answer: (B) Half
Explanation: CSA = 2πrh. If r doubles, h must become half.

Published by Mr. Dubey ⭐ 111.54K Points at 15-Jul-2026 06:29 am in Math

Explanation by: Mr. Dubey
CSA = 2πrh. If r doubles, h must become half.

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