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      Question

      Two trains 190 metres and 170 metres in length are

      running towards each other on parallel tracks, one at the rate 60 km/hr and another at 48 km/hr. In how many seconds will they be clear of each other from the moment they meet?
      A 12 seconds Correct Answer Incorrect Answer
      B 10 seconds Correct Answer Incorrect Answer
      C 15 seconds Correct Answer Incorrect Answer
      D 6 seconds Correct Answer Incorrect Answer

      Solution

      Required time = Sum of the lengths of trains / Relative speed Relative speed = 60 + 48 = 108 kmph = (108 × 5)/18 = 30 m/sec Required time = (190 + 170)/30 = 360/30 = 12 seconds

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