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Boat crossing a stream time taken

  1. Feb 25, 2015 #1
    1. The problem statement, all variables and given/known data
    In still water a boat travels at 6km/h. A stream is flowing south at 4km/h. Calculate the time it would take for the boat to travel directly across the stream and back if the stream is 1.5km wide
    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Feb 25, 2015 #2

    haruspex

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    As per forum rules, you need to make some attempt. At the very least, post your thoughts so far.
     
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