document.write( "Question 1075663: a boat took 1 hour 50 minutes to go 55 miles downstream and 3 hours 40 minutes to return. find the rate of the current.
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Algebra.Com's Answer #690319 by josgarithmetic(39618)\"\" \"About 
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r, speed if no current
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\n" ); document.write( "\n" ); document.write( "\"system%28r%2Bc=55%2F%2811%2F6%29%2Cr-c=55%2F%2811%2F3%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"system%28r%2Bc=30%2Cr-c=15%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"2c=15\" by Elimination Method.\r
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