calculate the surface area of a sphere of radius 7cm [Take π = 22/7]
MATHEMATICS
WAEC 1990
calculate the surface area of a sphere of radius 7cm [Take π = 22/7]
- A. 86cm2
- B. 154cm2
- C. 616cm2
- D. 1434cm2
Correct Answer: C. 616cm2
Explanation
Surface area of a sphere = 4πr2
= 4
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