document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=263749>Question 263749</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 	How far upstream can a motorboat travel at 8 mi/hr and still return downstream at 12 mi/hr in a total time of 4 hr?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #853992 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(53742)</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=853992\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "How far upstream can a motorboat travel at 8 mi/hr and still return downstream at 12 mi/hr in a total time of 4 hr?<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The solution in the post by @mananth is INCORRECT due to arithmetic error.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;His answer \"3 hours upstream and 1 hour downstream\" does not work, as everybody can check manually.\r<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;I came to bring a correct solution.\r<BR>\n" );
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document.write( "let the time taken upstream be x<BR>\n" );
document.write( "the down stream time will be 4-x hrs.<BR>\n" );
document.write( "speed upstream = 8 mph<BR>\n" );
document.write( "distance upstream = 8*x<BR>\n" );
document.write( "distance downstream = 12*(4-x)<BR>\n" );
document.write( "8x = 48-12x<BR>\n" );
document.write( "20x = 48<BR>\n" );
document.write( "x = 48/20 = 2.4 hours = 2 hours and 24 minutes ---------------------------------- 24 miles<BR>\n" );
document.write( "downstream time = 4 hours - 2.4 hours = 1.6 hours = 1 hour and 36 minutes.\r<BR>\n" );
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document.write( "The one way distance is  2.4 hours upstream * 8 mph = 19.2 miles.\r<BR>\n" );
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document.write( "<U>ANSWER</U>.  How far is 19.2 miles.\r<BR>\n" );
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document.write( "Solved correctly.\r<BR>\n" );
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