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    Question

    What is the length of the bridge which a man riding 21

    km an hour can cross in 3 min.?
    A 600 m Correct Answer Incorrect Answer
    B 1000 m Correct Answer Incorrect Answer
    C 900 m Correct Answer Incorrect Answer
    D 1050 m Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    Speed = 21km/hr , Time = 3 minutes = 3 × 60 = 180 seconds, Distance = ? Distance = Speed × Time = 21 × (5 )/18 × 180 = 1050 m

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