Q. If the surface area of a sphere is increased by 44%, the radius increases by:
✅ Correct Answer: (B)
20%
Explanation: Surface area ∝ r². √1.44 = 1.2, so radius increases by 20%.
Explanation by: Mahesh Chandra
Surface area ∝ r². √1.44 = 1.2, so radius increases by 20%.