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      Question

      Two trains β€˜K’ and β€˜L’ of equal lengths are

      running on parallel tracks at speeds of 45 m/s and 55 m/s, respectively. If they can cross each other in β€˜u’ seconds while traveling in opposite directions to each other and take 60 seconds to cross each other while traveling in the same direction, then find the value of β€˜u’.
      A 5 Correct Answer Incorrect Answer
      B 6 Correct Answer Incorrect Answer
      C 12 Correct Answer Incorrect Answer
      D 10 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Let the length of train β€˜K’ and β€˜L’ be β€˜k’ metres and β€˜l’ metres, respectively. According to the question: Also, Dividing equation (1) by equation (2), we get:

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