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      Question

      A 200 m long train at the speed of 60 km/h crosses

      another train as fast as twice the speed of first and running in opposite direction in 10 sec. Find the length of the second train.ย 
      A 250 m Correct Answer Incorrect Answer
      B 275 m Correct Answer Incorrect Answer
      C 300 m Correct Answer Incorrect Answer
      D 350 m Correct Answer Incorrect Answer

      Solution

      ATQ, Speed of first train = 60 km/h = 16.67 m/s Speed of second train = Twice the first = 33.33 m/s Relative speed (opposite direction) = 16.67 + 33.33 = 50 m/s Total time to cross = 10 sec Using the formula: Total Distance = Relative Speed ร— Time (200+L)=50ร—10 = 500 L= 300 meters Hence, the length of the second train is 300 meters.

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