document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=693405>Question 693405</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A logging barge on the Mississippi River travels 24 miles upstream in 3 hours. The return trip take the barge only 2 hours. Find the rate of the barge in still water. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #427381 by </B><A HREF=/tutors/aboutme.mpl?userid=pmatei><B>pmatei(79)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=pmatei><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=427381\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Speed is distance divided by time. \r<BR>\n" );
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document.write( "Going upstream slows you down by the speed of the river\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v%5Bbarge%5D-v%5Briver%5D=%2824miles%29%2F%283hours%29=8mph ALIGN=MIDDLE  ALT=\"v%5Bbarge%5D-v%5Briver%5D=%2824miles%29%2F%283hours%29=8mph\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Going downstream you go faster:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v%5Bbarge%5D%2Bv%5Briver%5D=%2824miles%29%2F%282hours%29=12mph ALIGN=MIDDLE  ALT=\"v%5Bbarge%5D%2Bv%5Briver%5D=%2824miles%29%2F%282hours%29=12mph\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "If you add the two equations, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v%5Briver%5D ALIGN=MIDDLE  ALT=\"v%5Briver%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" > cancels and you get:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2v%5Bbarge%5D=20mph ALIGN=MIDDLE  ALT=\"2v%5Bbarge%5D=20mph\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v%5Bbarge%5D=10mph ALIGN=MIDDLE  ALT=\"v%5Bbarge%5D=10mph\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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