Q. The ratio of the surface areas of two spheres is 25 : 49. The ratio of their radii is:
✅ Correct Answer: (B)
5 : 7
Explanation: Surface area ∝ r². Radius ratio = √(25:49) = 5:7.
Explanation by: Mahesh Chandra
Surface area ∝ r². Radius ratio = √(25:49) = 5:7.