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    Question

    Train P is 180 m long and crosses a platform of 120 m in 15

    seconds. The speed ratio of train P to train Q is 4:5. What is the length of train Q if it crosses a pole in 16 seconds?
    A 200 m Correct Answer Incorrect Answer
    B 400 m Correct Answer Incorrect Answer
    C 120 m Correct Answer Incorrect Answer
    D 330 m Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Train P speed = (180 + 120) / 15 = 20 m/sec

    Speed of train Q = (20 × 5) / 4 = 25 m/sec

    Length of train Q = 25 × 16 = 400 m

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