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      Question

      Train A whose length is 180m is crosses a man standing

      in the bridge in 4.5 seconds. Train B whose length is165 m, is running at a speed of 63 km/hr and moving in opposite direction to that of train A. Find the time required for train A to cross train B?
      A 8 sec Correct Answer Incorrect Answer
      B 6 sec Correct Answer Incorrect Answer
      C 9 sec Correct Answer Incorrect Answer
      D 10 sec Correct Answer Incorrect Answer
      E 12 sec Correct Answer Incorrect Answer

      Solution

      According to the question, 180 = 4.5 * speed of train A Speed of train A = 40 m/s Speed of train B = 63*(5/18) = 35/2 m/s 345 = (40 + 35/2)* T (345*2)/ 115 = T T = 6 seconds

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