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Multiple Choice Questions

The speed of boat in still water is 10 km hr it covers upstream a distance of 45km in 6 hours The sp...........

Quantitative Aptitude ( CCS) Boats and Streams
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    The speed of boat in still water is 10 km/hr it covers (upstream) a distance of 45km in 6 hours, The speed (in km/hr) of the stream is :

    2.5 km/h

    Correct Answer

    3 km/h

    Incorrect Answer

    3.5 km/h

    Incorrect Answer

    4 km/h

    Incorrect Answer
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    Explanation:

    ?The speed of the boat in still water, x = 10 km/h
    Upstream speed, U = 45/6 km/h
    Thus, x – y = 45/6
    10 – y = 45/6
    y = 10 – 45/6
    = 60 – 45/6 = 15/6 = 2.5 km/h
    Thus, Speed of the stream, y = 2.5 km/h

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