document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=317840>Question 317840</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat takes 4 hours to travel 192 miles 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 #227614 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=227614\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let speed of boat be x mph<BR>\n" );
document.write( "speed of current be y mph<BR>\n" );
document.write( "..<BR>\n" );
document.write( "speed * time = distance<BR>\n" );
document.write( "4(x-y)=192<BR>\n" );
document.write( "x-y=48<BR>\n" );
document.write( "..<BR>\n" );
document.write( "2(x+y)=192<BR>\n" );
document.write( "x+y=96<BR>\n" );
document.write( "add both the equations<BR>\n" );
document.write( "x-y+x+y=96+48<BR>\n" );
document.write( "2x=144<BR>\n" );
document.write( "x=72 mph. speed of boat<BR>\n" );
document.write( "..<BR>\n" );
document.write( "x-y=48<BR>\n" );
document.write( "72-y=48<BR>\n" );
document.write( "y=72-48<BR>\n" );
document.write( "24 mph speed of current </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );