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Discussion :: Boats and Streams

  1. What is the speed of the boat in still water?

     I. The boat covers a distance of 48 kms in 6 hours while running upstream.

     II. The boat covers the same distance in 4 hours while running downstream.

  2. A.

    I alone sufficient while II alone not sufficient to answer


    II alone sufficient while I alone not sufficient to answer


    Either I or II alone sufficient to answer


    Both I and II are not sufficient to answer


    Both I and II are necessary to answer

    View Answer


    Answer : Option E

    Explanation :

    I. Speed upstream =\(\frac {48 } { 2 } \)km/hr=8km/hrI. 


    IISpeed downstream =\(\frac {48 } { 4 } \)km/hr=8km/hr


    Speed of the boat =\(\frac { 1 } { 2 } (8+12)\)km/hr=10km/hr


    Thus, I and II together give the answer.


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