document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=468359>Question 468359</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A fisherman can row up stream at 2mph and downstream at 8mph. He started rowing upstream until he got tired and then he rowed down stream to his starting point. How far did her row if the entire trip took 2 hours? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #321375 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=321375\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> d = rt<BR>\n" );
document.write( "t = d/r<BR>\n" );
document.write( "2 = d/2 + d/8 = 5d/8<BR>\n" );
document.write( "5d = 16<BR>\n" );
document.write( "d = 3.2 miles one way<BR>\n" );
document.write( "--> 6.4 miles total<BR>\n" );
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document.write( "Another approach:<BR>\n" );
document.write( "The average speed of a round trip is<BR>\n" );
document.write( "2*v1*v2/(v1 + v2)<BR>\n" );
document.write( "2*2*8/(2+8) = 3.2 mph<BR>\n" );
document.write( "It's similar to parallel resistors, but 2 times that.<BR>\n" );
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document.write( "His avg speed was 3.2 mph for 2 hours = 6.4 miles round trip<BR>\n" );
document.write( " </SPAN>\n" );
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