<PRE><B>Question 1122280</B>
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a swimmer going downstream takes 1 hour and 20 minutes to travel a certain distance. it takes the swimmer 4 hours to make the return trip against the current. if the river flows at the rate of 1.5 miles per hour, find the rate of the swimmer in still water and the distance traveled one way.
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DOWNSTREAM:  {{{(r+1.5)*(1&amp;1/3)=d}}}


UPSTREAM:  {{{(r-1.5)(4)=d}}}



{{{system((r+3/2)(4/3)=d,(r-3/2)*4=d)}}}------solve for r by equating the two expressions of d.  Use r to then solve for d any way you want.</PRE>