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Discussion :: Boats and Streams

  1. A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current?
  2. A.
    3 kmph
    B.
    1.5 kmph
    C.
    13 kmph
    D.
    6.5 kmph

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    Answer : Option B

    Explanation :

    72 --- 9              DS = 8

    ? ---- 1

    45 ---- 9            US = 5

    ? ---- 1               S = ?

    S = (8 - 5)/2 = 1.5


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