Multiple Choice Questions on A man can row 9 3 5 km hr in still water and he finds that it takes him twice as much time to row up........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A man can row 9 3 5 km hr in still water and he finds that it takes him twice as much time to row up...........

Quantitative Aptitude ( CCS) Boats and Streams
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    A man can row 9 3/5 km/hr in still water and he finds that it takes him twice as much time to row up than as to row down the same distance in river. The speed (km/hr) of the current is 

    2

    Incorrect Answer

    2 (1/2)

    Incorrect Answer

    3 (1/5)

    Correct Answer

    5

    Incorrect Answer
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    Explanation:

    ?Let downstream time = t, then upstream time = 2t
    B = [tu + td] / [tu – td] * R
    48/5 = [2t+t] / [2t-t] * R
    = 3 (1/5)

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