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      Question

      A train 120 m long crosses another train 150 m long,

      coming from the opposite direction, in 10 seconds. If the speed of the first train is 54 km/h, find the speed of the second train.
      A 43.2 km/h Correct Answer Incorrect Answer
      B 50 km/h Correct Answer Incorrect Answer
      C 56.6 km/h Correct Answer Incorrect Answer
      D 48 km/h Correct Answer Incorrect Answer

      Solution

      Relative speed = (120 + 150)/10Β  = 27 m/s = 97.2 km/h. Speed of second train = 97.2 - 54 = 43.2 km/h.Β  Correct option: a

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