document.write( "Question 280396: A boy swims downstream 0.9 miles in the same amount of time that he can swim 0.6 miles upstream. If the rate of the current is 1.5 mph, how fast can he swim in still water? \n" ); document.write( "
Algebra.Com's Answer #203802 by richwmiller(17219)\"\" \"About 
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rt=d
\n" ); document.write( "(r+1.5)*t=.9 miles
\n" ); document.write( "(r-1.5)*t=.6 miles
\n" ); document.write( "r=7.5 mph in still water
\n" ); document.write( "t=.1
\n" ); document.write( "check
\n" ); document.write( "9t=.9
\n" ); document.write( "6t=.6
\n" ); document.write( "t=.1 hour\r
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