calculate the surface area of a sphere of radius 7cm [Take π = 22/7]

  • A 86cm2
  • B 154cm2
  • C 616cm2
  • D 1434cm2
  • E 4312cm2
waec 1990mathematics

The correct answer is C. 616cm2

Surface area of a sphere = \(4\pi r^2\)

= \(4 \times \frac{22}{7} \times 7 \times 7\)

= \(616 cm^2\)

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