document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=415075>Question 415075</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a motor boat took 3 hours to make a downstream trip with a 4 mph current. The return trip against the same current took 5 hours. Find 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 #291035 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=291035\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let speed in still water = x<BR>\n" );
document.write( "current speed = 4<BR>\n" );
document.write( "..<BR>\n" );
document.write( "upstream speed = x-4<BR>\n" );
document.write( "downstream speed = x+4<BR>\n" );
document.write( "..<BR>\n" );
document.write( "upstream time = 4 hours<BR>\n" );
document.write( "downstream time = 3 hours<BR>\n" );
document.write( "..<BR>\n" );
document.write( "Distance = same<BR>\n" );
document.write( "4(x-4)=3(x+4)<BR>\n" );
document.write( "4x-16=3x+12<BR>\n" );
document.write( "4x-3x=12+16<BR>\n" );
document.write( "x= 28 miles distance </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );