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      Question

      Bikes 'X' and 'Y' are moving towards one another on a

      straight road at 48 km/h and 60 km/h respectively. If the distance separating them is 600 metres, find the time before they cross each other.
      A 60 secs Correct Answer Incorrect Answer
      B 50 secs Correct Answer Incorrect Answer
      C 20 secs Correct Answer Incorrect Answer
      D 42 secs Correct Answer Incorrect Answer

      Solution

      ATQ,

      Combined speed of bikes 'X' and 'Y' = 48 + 60 = 108 km/h

      = 108 Ɨ (5/18) = 30 m/s

      So, required time = 600 Ć· 30 = 20 seconds

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