document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1110733>Question 1110733</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat takes 3 hours to travel 108mi going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #725745 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=725745\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A motorboat takes 3 hours to travel 108mi going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? <BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Upstream DATA:<BR>\n" );
document.write( "rate = 108 mi/3 hrs = 36 mph<BR>\n" );
document.write( "downstream DATA:<BR>\n" );
document.write( "rate = 108/2 = 54 mph<BR>\n" );
document.write( "-------<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "b - c = 36 mph<BR>\n" );
document.write( "b + c = 54 mph<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "2b = 90<BR>\n" );
document.write( "boat speed = 45 mph<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Solve for \"c\":<BR>\n" );
document.write( "b + c = 54<BR>\n" );
document.write( "45 + c = 54<BR>\n" );
document.write( "current = 9 mph<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );