document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=587636>Question 587636</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Paddleboat can move at the speed of 8km/hr in still water. The boat is paddled 10km downstream in the same time it takes to go 5km upstream. What is the speed of the river </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #374180 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=374180\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Boat speed	=	8	km/h										<BR>\n" );
document.write( "current  speed	=	x	km/h										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "speed against	current	8	-	x									<BR>\n" );
document.write( "speed with	current	8	+	x									<BR>\n" );
document.write( "													<BR>\n" );
document.write( "Distance against	current	5	km										<BR>\n" );
document.write( "Distance with	current	10	km										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "t=d/r	time against = time with		current										<BR>\n" );
document.write( "5/(8-x)=10/(8+x)<BR>\n" );
document.write( "5(8+x)=	10(8-x)			<BR>\n" );
document.write( "40+5x=80-10x					<BR>\n" );
document.write( "10x+5x	=80-40						<BR>\n" );
document.write( "15x=40										<BR>\n" );
document.write( "/	15												check<BR>\n" );
document.write( "x	=	2.67	km/h	current  speed									 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );