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Banking Sample Paper IBPS PO (PT) Sample Test Paper-1

  • question_answer
    A man takes 2.2 times as long to row a distance up stream as to row the same distance downstream. If he can row 77 km downstream in 3 hours 30 minutes, then. what is the speed of the boat in still water? (in km/hr)

    A)  14 km/hr                    

    B)  12 km/hr

    C)  10 km/hr                    

    D)  16 km/hr

    E)  18 km/hr

    Correct Answer: D

    Solution :

     Rate downstream \[=\frac{77}{7}\times 2\] \[\text{= 22 km/hr}\] Time taken in upstream jouney \[\text{=}\frac{7}{2}\times 2.2=7.7\] hours Rate upstream \[=\frac{77}{7.7}=10km/hr\] \[\therefore \] Speed of boat in still water \[=\frac{1}{2}(22+10)=\frac{1}{2}\times 32=16km/hr\]


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