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    • Question

      Two athletes start running on a circular track of length

      1,500 metres in the same direction at speeds of 20 m/s and 18 km/h respectively. How many times will they meet in 10 minutes?
      A 5 Correct Answer Incorrect Answer
      B 1 Correct Answer Incorrect Answer
      C 6 Correct Answer Incorrect Answer
      D 2 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, 18 km/h = 18 × (5/18) = 5 m/s
      Relative speed = 20 − 5 = 15 m/s
      Time interval after which they meet = (1,500 ÷ 15) = 100 seconds
      Required number of times = (10 × 60) ÷ 100 = 6 times

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