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      Question

      Two trains of lengths 100 m and 150 m are travelling in

      opposite directions at speeds of 75 kmph and 50 kmph respectively. What is the time taken by them to cross each other?
      A 7.4 sec Correct Answer Incorrect Answer
      B 7.2 sec Correct Answer Incorrect Answer
      C 7 sec Correct Answer Incorrect Answer
      D 6.8 sec Correct Answer Incorrect Answer

      Solution

      Relative speed = 75 + 50 = 125 kmph `=125xx5/18` m/s Total distance = 150 + 100 = 250 m Time taken to cross each other `= (250xx18)/(125xx5) = 7.2`

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