Q. If the surface area of a sphere is 616 cm², its radius is:
✅ Correct Answer: (A)
7 cm
Explanation: 4πr² = 616 ⇒ 4 × (22/7) × r² = 616 ⇒ r² = 49 ⇒ r = 7 cm.
Explanation by: Mahesh Chandra
4πr² = 616 ⇒ 4 × (22/7) × r² = 616 ⇒ r² = 49 ⇒ r = 7 cm.