document.write( "Question 450104: If a boat in a 4 mph current can travel 76 miles downstream in the same time it takes to travel 20 miles upstream, what is the speed of the boat in still water \n" ); document.write( "

Algebra.Com's Answer #309670 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "Let x represent speed of boat in still water
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document.write( "Question states***Times up and downstream the same: t = D/r
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document.write( " 76/(x+4) = 20/(x-4)   Cross Multiplying 
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document.write( "  76(x-4) = 20(x+4)
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document.write( "     56x = 80 + 304
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document.write( "     56x = 384
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document.write( "       x = 6.857 mph, the speed of boat in still water
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