document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=449546>Question 449546</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Kari’s boat can move at a speed of 20 mph in still water. The boat travels 108 mi downstream in a river in the same time it takes to go 72 mi upstream. What is the speed of the river?  Write your answer in the form # mph.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #315128 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=315128\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 108/20+c=72/20-c<BR>\n" );
document.write( "108(20-c)=72(20+c)<BR>\n" );
document.write( "2160-108c=1440+72c<BR>\n" );
document.write( "180c=720<BR>\n" );
document.write( "c=4<BR>\n" );
document.write( "The current is 4 mph.. </SPAN>\n" );
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