What is the surface area of a sphere with radius 7 cm using π = 22/7?
A
616 cm²
B
600 cm²
C
588 cm²
D
624 cm²
Correct Answer: Option A — 616 cm²
Explanation:
Surface area = 4πr² = 4 × (22/7) × 49 = 4 × 22 × 7 = 616 cm². Sphere formulas for both surface area and volume (4/3)πr³ are standard geometry questions. Understanding which formula to apply and correctly substituting values including the radius is the key challenge in competitive exam geometry problems.