document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=998846>Question 998846</A>: <I><SPAN STYLE=\"word-break: break-all;\"> On an upstream trip, a canoe travels 40 km in 5 hours.  Downstream, it travels the same distance in half the time.  What is the rate of the canoe in still water and the rate of the current? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #616604 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52814)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=616604\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "On an upstream trip, a canoe travels 40 km in 5 hours. Downstream, it travels the same distance in half the time. <BR>\n" );
document.write( "What is the rate of the canoe in still water and the rate of the current?<BR>\n" );
document.write( "-------------------------------------------------------------------\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "On an upstream trip, &nbsp;the canoe speed relative to the river banks is &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40_km%2F5_hours ALIGN=MIDDLE  ALT=\"40_km%2F5_hours\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 8 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >. \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "This speed is the difference of the speed of canoe relative water, &nbsp;u, &nbsp;and the speed of current, &nbsp;v:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "8 = u - v. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Downstream, &nbsp;the canoe speed relative to the river banks is twice more: &nbsp;<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F2.5 ALIGN=MIDDLE  ALT=\"40%2F2.5\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 16 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "This speed is the sum of the speed of canoe relative water, &nbsp;u, &nbsp;and the speed of current, &nbsp;v:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "16 = u + v. &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Add &nbsp;(1) &nbsp;and &nbsp;(2). &nbsp;You will get \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "2u = 8 + 16 = 24, &nbsp;hence, &nbsp;u = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=24%2F2 ALIGN=MIDDLE  ALT=\"24%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 12 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "\n" );
document.write( "Then &nbsp;v = 4 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<U>Answer</U>. &nbsp;The canoe speed in a still water is &nbsp;12 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >. \r<BR>\n" );
document.write( "\n" );
document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The current speed is &nbsp;4 <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=km%2Fh ALIGN=MIDDLE  ALT=\"km%2Fh\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );