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    Question

    A train 600 metres long is running at a speed of 54

    km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
    A 590 m Correct Answer Incorrect Answer
    B 450 m Correct Answer Incorrect Answer
    C 650 m Correct Answer Incorrect Answer
    D 300 m Correct Answer Incorrect Answer

    Solution

    Let the length of the tunnel be ‘x’ meter. Speed = 54 × (5/18) m/sec = 15 m/sec Time = 1 minute = 60 seconds. Let the length of the tunnel be x metres. Then, (600 + x)/60 = 15 =>(600 + x) = 900 => x = 300 m

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