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SSC Quantitative Aptitude Boats & Streams Question Bank Train and Boat (I)

  • question_answer
                A train 300 m long is running with a speed of 54 km/h. In what time will it cross a telephone pole?                      [SSC CGL Tier II, 22014]

    A) 20 s

    B) 15 s

    C) 17 s

    D) 18 s

    Correct Answer: A

    Solution :

    [a] To cross the telephone pole the train has to move a distance equal to its length, i.e., 300 m             Now, speed of train \[=54\times \frac{5}{18}\text{m/s}=15\text{m/s}\] \[\therefore \]Time taken to cover the distance \[=\frac{\text{Distance}\,\text{travelled}}{\text{Speed}}\] \[=\frac{300}{15}=20\,\text{s}\]


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