Find the surface area of a sphere whose radius is 3.5 cm (Use π = 22/7)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 154 cm2.
Surface area of a sphere = 4πr2 = 4 × (22/7) × 3.52
= 4 × (22/7) × 3.5 × 3.5
= 154 cm2