Subject

    Quantitative Aptitude

    Topic

    Speed & Distance

    A man can row at the rate of 4km/hr. in still water. If the time taken to row a certain distance upstream is 3 times as much as to row the same distance downstream, find the speed of the current.

    ক)
    15 km/hr
    খ)
    6 km/hr
    গ)
    20 km/hr
    ঘ)
    2 km/hr

    Explanation

    speed of the  current = (n-1)/(n+1) X speed of the man                                 =3-1/3+1 X 4 =1/2 X 4= 2 km/hr

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