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Discussion :: Boats and Streams

  1. A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?

    2. A.

    4 km/hr
    B.

    6 km/hr
    C.

    8 km/hr
    D.

    Data inadequate

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    Workspace

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    Answer : Option B

    Explanation :

    Rate downstream =\([\frac { 16 } { 2 }]\)kmph = 8 kmph.

    Rate upstream =\([\frac { 16 } { 4 }]\)kmph = 4 kmph.

     Speed in still water = \(\frac { 1 } { 2 }\)(8 + 4) kmph = 6 kmph.

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