document.write( "Question 324804: A barge takes 3 hours to move (at a constant speed) downstream for 27 miles, helped by a current of 3 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current. \n" ); document.write( "
Algebra.Com's Answer #232644 by Fombitz(32388)\"\" \"About 
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Rate*Time=Distance
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\n" ); document.write( "Let B be the barge speed in still water.
\n" ); document.write( "\"%28B%2B3%293=27\"
\n" ); document.write( "\"B%2B3=9\"
\n" ); document.write( "\"B=6\"
\n" ); document.write( "On the return trip, the current works against you.
\n" ); document.write( "\"%28B-3%29T=27\"
\n" ); document.write( "\"6-3%29T=27\"
\n" ); document.write( "\"3T=27\"
\n" ); document.write( "\"T=9\"
\n" ); document.write( "It takes 9 hours to make the return trip.
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