document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=278370>Question 278370</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat can travel from its dock to a town downriver with a 7 mph current in 10 hours. The return trip against the same current takes 15 hours. What is the speed of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #202570 by </B><A HREF=/tutors/aboutme.mpl?userid=Grinnell><B>Grinnell(63)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Grinnell><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=202570\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> OK! Goodmorning.<BR>\n" );
document.write( "Let x be the speed of the boat in still water.<BR>\n" );
document.write( "Let x+7 be the speed of the boat with a 7 mph current pushing it along.<BR>\n" );
document.write( "Let x-7 be the speed of the boat going against the (same--mph) current coming back upstream.<BR>\n" );
document.write( "Remember Rate x Time =Distance\r<BR>\n" );
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document.write( "We know the distance will be the same, SO off to the races!<BR>\n" );
document.write( "(x+7)mph TIMES 10 hours E Q U A L S (x-7)mph TIMES 15 hours <BR>\n" );
document.write( "10x+70=15x-105<BR>\n" );
document.write( "175=5x<BR>\n" );
document.write( "35=x\r<BR>\n" );
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document.write( "Therefore 35 is speed of boat in still water.  </SPAN>\n" );
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