document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=312898>Question 312898</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the speed of the river is 5 mph, and a boat that can travel 25 miles upstream in the same time it would take to go 45 miles downstream. 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 #223830 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=223830\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let speed of boat in still water be x mph<BR>\n" );
document.write( "..<BR>\n" );
document.write( "downstrea+ the speed will be x+5 mph<BR>\n" );
document.write( "distance traveled = 45 miles.<BR>\n" );
document.write( "time taken = 45/ x+5<BR>\n" );
document.write( "..<BR>\n" );
document.write( "up stream the speed will be x-5 mph<BR>\n" );
document.write( "distance traveled = 25 miles<BR>\n" );
document.write( "time taken = 25/ x-5<BR>\n" );
document.write( "..<BR>\n" );
document.write( "both take same time<BR>\n" );
document.write( "..<BR>\n" );
document.write( "45/x+5 = 25/x-5<BR>\n" );
document.write( "45(x-5)=25(x+5)<BR>\n" );
document.write( "45x-225=25x+125<BR>\n" );
document.write( "45x-25x=350<BR>\n" );
document.write( "20x=350<BR>\n" );
document.write( "x= 17.5 mph speed of boat in still air<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );