Multiple Choice Questions on In downstream traveling a boat crossed a man standing on the bank of the river in 3 sec If the lengt........... for CDS Exam Preparation

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Multiple Choice Questions

In downstream traveling a boat crossed a man standing on the bank of the river in 3 sec If the lengt...........

Quantitative Aptitude (CDS) Boats and Streams
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    In downstream traveling, a boat crossed a man standing on the bank of the river in 3 sec. If the length of the boat is 20 m and traveling with speed 5 m/sec.find the speed of the stream? 

    4.2m/ sec

    Incorrect Answer

    3 m/sec

    Incorrect Answer

    5/3 m/ sec

    Correct Answer

    8/3 m/sec

    Incorrect Answer
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    Explanation:

    Cross the man 9 sec
    L=20 m
    Boat speed =5m/sec
    Downstream velocity=5+v
    3=20/v+5
    3v+15=20
    3v=5
    V=5/3 m/sec

    By: bhavesh kumar singh
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