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find the radius of a sphere whose surface area is 154cm2 (\(\pi = \frac{22}{7}\))

find the radius of a sphere whose surface area is 154cm2 (\(\pi = \frac{22}{7}\))
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  • A 7.00cm
  • B 3.50cm
  • C 3.00cm
  • D 1.75cm
Correct Answer: Option B
Explanation:
Surface area = 154cm2 (area of sphere)
4\(\pi\)r2 = 154
r\(\sqrt{\frac{154}{4\pi}}\)
= 3.50cm

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