Q. The ratio of the curved surface areas of two cones having equal slant heights is 4 : 9. The ratio of their radii is:

  • (A) 2 : 3
  • (B) 4 : 9
  • (C) 16 : 81
  • (D) 3 : 2
✅ Correct Answer: (A) 2 : 3
Explanation: CSA = πrl. With equal slant heights, CSA is proportional to radius.

Published by Mr. Dubey ⭐ 109.02K Points at 15-Jul-2026 07:07 am in Math

Explanation by: Mr. Dubey
CSA = πrl. With equal slant heights, CSA is proportional to radius.

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