Q. The ratio of the surface area of a sphere to the curved surface area of a hemisphere of the same radius is:
✅ Correct Answer: (B)
2 : 1
Explanation: Sphere SA = 4πr² and Hemisphere CSA = 2πr². Ratio = 2:1.
Explanation by: Mahesh Chandra
Sphere SA = 4πr² and Hemisphere CSA = 2πr². Ratio = 2:1.