document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=898220>Question 898220</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A barge traveling down a river covers a distance of 36 miles in 4 hours.  It would have traveled the same distance in 6 hours if it had been traveling upstream against the current.  What is the speed of the river current?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #544709 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=544709\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A barge traveling down a river covers a distance of 36 miles in 4 hours. It would have traveled the same distance in 6 hours if it had been traveling upstream against the current. What is the speed of the river current?<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=speed of barge in still water<BR>\n" );
document.write( "x+c=speed of boat downstream<BR>\n" );
document.write( "x-c=speed of boat upstream<BR>\n" );
document.write( "travel time*speed=distance<BR>\n" );
document.write( "..<BR>\n" );
document.write( "4(x+c)=36<BR>\n" );
document.write( "6(x-c)=36<BR>\n" );
document.write( "..<BR>\n" );
document.write( "4x+4c=36<BR>\n" );
document.write( "6x-6c=36<BR>\n" );
document.write( "..<BR>\n" );
document.write( "12x+12c=108 (mult. by 3)<BR>\n" );
document.write( "12x-12c=72  (mult. by 2)<BR>\n" );
document.write( "subtract:<BR>\n" );
document.write( "24c=36<BR>\n" );
document.write( "c=36/24=3/2=1.5<BR>\n" );
document.write( "speed of the river current=1.5 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );