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      Question

      Three boys runs around a circular track and takes 10

      min, 30 min and 35 min respectively to complete the one round. When do they all come relatively to the same position as at a certain point of time in their path?
      A 210 min Correct Answer Incorrect Answer
      B 252 min Correct Answer Incorrect Answer
      C 150 min Correct Answer Incorrect Answer
      D 300 min Correct Answer Incorrect Answer

      Solution

      ∴  Required time = LCM of (10, 30 and 35) = 210 min Hence, after 210 min they all come relatively to the same position as at a certain point of time in their path.

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