Multiple Choice Questions on A man can row 6kmph in still water If river flows at 2 km an hour it takes him 40 minutes to row to ........... for CDS Exam Preparation

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Multiple Choice Questions

A man can row 6kmph in still water If river flows at 2 km an hour it takes him 40 minutes to row to ...........

Quantitative Aptitude (CDS) Time & distance
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    A man can row 6kmph in still water. If river flows at 2 km an hour, it takes him 40 minutes to row to a place and back, how far off is the place?

     

    1.60km
     

    Incorrect Answer

    2.4km
     

    Incorrect Answer

    1.77km
     

    Correct Answer

    3km 

    Incorrect Answer
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    Explanation:

    Speed downstream = ( 6+2)kmph= 8kmph
    Speed upstream = (6-2)kmph = 4kmph
    Let the required distance be x km. Then,
    x/8 + x/4 = 40/60
    3x = 2/3×8
    x= 1.77km
    Hence required distance is 1.77km

    By: bhavesh kumar singh
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