document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83155>Question 83155</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A kayak wint up a river and back in 6 hours. If their rate up the river was 2 miles per hour and back 4 miles per hour, how far did they go up the river? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #59674 by </B><A HREF=/tutors/aboutme.mpl?userid=Mogana><B>Mogana(4)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mogana><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=59674\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x be time taken upstream and y time taken downstream.\r<BR>\n" );
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document.write( "Total number of hours  is:  x + y = 6hrs\r<BR>\n" );
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document.write( "Given speed upstream is 2miles per hour and speed downstream is 4 miles per hour.\r<BR>\n" );
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document.write( "the distance traveled upstream  = distance traveled downstream\r<BR>\n" );
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document.write( "==>speed upstream * time taken  = speed downstream * time taken          \r<BR>\n" );
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document.write( "2 *x       = 4 * y  \r<BR>\n" );
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document.write( "Substitute for y in the above\r<BR>\n" );
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document.write( "2 * x   =   4 * (6-x)\r<BR>\n" );
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document.write( "2(x) = 24 - 4x\r<BR>\n" );
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document.write( "6x = 24\r<BR>\n" );
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document.write( "x = 24 /6\r<BR>\n" );
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document.write( "x = 4hrs\r<BR>\n" );
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document.write( "The time taken upstream is 4hrs\r<BR>\n" );
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document.write( "we know that..\r<BR>\n" );
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document.write( "distance traveled upstream =  speed upstream   * time taken<BR>\n" );
document.write( "                           =  2 * 4 =  8 miles\r<BR>\n" );
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document.write( "Distance traveled upstream is 8 miles \r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );