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Find the radius of a sphere whose surface area is 154 cm2

Find the radius of a sphere whose surface area is 154 cm2
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A 7.00 cm
  • B 3.50 cm
  • C 3.00 cm
  • D 1.75 cm
Correct Answer: Option B
Explanation:
154 = 4 x 22 x r2
7



154x7 = r2
4x22




√ 49/4 = r7 = r
2




∴r = 3.50

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