Q. The ratio of the curved surface area of a hemisphere to the surface area of a sphere of the same radius is:

  • (A) 1 : 2
  • (B) 2 : 3
  • (C) 3 : 4
  • (D) 1 : 1
✅ Correct Answer: (A) 1 : 2
Explanation: Hemisphere CSA = 2πr² and Sphere SA = 4πr². Ratio = 1:2.

Published by Mahesh Chandra ⭐ 7.32K Points at 15-Jul-2026 08:03 pm in Math

Explanation by: Mahesh Chandra
Hemisphere CSA = 2πr² and Sphere SA = 4πr². Ratio = 1:2.

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