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      Question

      The ratio of weights of two spheres of different

      materials is 8:17 and the ratio of the weights per same of materials of each is 289:64. The ratio of radius of the two spheres is.
      A 5:12 Correct Answer Incorrect Answer
      B 8:17 Correct Answer Incorrect Answer
      C 9:5 Correct Answer Incorrect Answer
      D 3:7 Correct Answer Incorrect Answer

      Solution

      Density = mass / volume Ratio of the volumes of spheres = (8/289)/ (17/64) = (8├Ч64)/17├Ч289 4/3 ╧Аr13 /4/3 ╧Аr23 = 512/17├Ч289 r1: r2 =8:17

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