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      Question

      A metro train moves at a speed of 40 m/s and takes 20

      seconds to pass a traffic signal. Calculate the time required for the train to completely pass through a 700-metre-long subway.
      A 12.5 secs Correct Answer Incorrect Answer
      B 37.5 secs Correct Answer Incorrect Answer
      C 42.5 secs Correct Answer Incorrect Answer
      D 52.5 secs Correct Answer Incorrect Answer

      Solution

      ATQ,

      Length of the train = 20 × 40 = 800 metres

      Time taken to cross the subway = (800 + 700)/40 = 1500/40 = 37.5 seconds

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