document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=622515>Question 622515</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this equation:  Alvin paddled for 2 hours with a 5-km/hr current to reach a campsite.  The return trip against the same current took 7 hours. \r<BR>\n" );
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document.write( "Find the speed of the boat in still water.\r<BR>\n" );
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document.write( "What is the speed of the boat in still water?  ___ km/hr. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #391415 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=391415\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "Distance equals rate times time, so <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE d\ =\ 2(r\ +\ 5)\"> and <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE d\ =\ 7(r\ -\ 5)\">.  But <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE d\ =\ d\"> so:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ 7(r\ -\ 5)\ =\ 2(r\ +\ 5)\">\r<BR>\n" );
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document.write( "Solve for <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE r\">\r<BR>\n" );
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document.write( "By the way, tell your teacher that if s/he is going to make up problems, construct them so that the answers make sense in the real world.  Alvin's sustained paddling speed approximates the speed of the world canoe record holder for a 5000 meter race and is only slightly slower than the record for the kayak at the same distance.  The distance here is NINE times as far.  No human can paddle that fast for that far.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi}\ +\ 1\ =\ 0\"><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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