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      Question

      Train A running at a speed of 48 km/hr crosses train B

      in 20 seconds. Find the speed of train B (in km/hr), if the sum of the length of train A and B is 450 meters and both trains running in the opposite direction.
      A 31 km/hr Correct Answer Incorrect Answer
      B 36 km/hr Correct Answer Incorrect Answer
      C 21 km/hr Correct Answer Incorrect Answer
      D 24 km/hr Correct Answer Incorrect Answer
      E 33 km/hr Correct Answer Incorrect Answer

      Solution

      Let speed of train B be ‘x’ km/hr. According to question, => 20(48 + x) × (5/18) = 450 => 960 + 20x = 1620 => 20x = 660 => x = 33 km/hr

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