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      Question

      The Volumes of the two spheres are in the ratio 64:125.

      Their surface area will be in the ratio.
      A 4:5 Correct Answer Incorrect Answer
      B 7:11 Correct Answer Incorrect Answer
      C 16:25 Correct Answer Incorrect Answer
      D 49:121 Correct Answer Incorrect Answer
      E 81:169 Correct Answer Incorrect Answer

      Solution

      V1/V2 = (S1/S2)3/2 S1/S2 = (V1/V2)2/3 = (64/125)2/3 = (4/5)3×2/3 S1: S2  = 16:25

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