document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=930545>Question 930545</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat travels 36 miles downstream (with the current) and returns the same distance upstream (against the current). The boat's speed was 15 mph. If round trip took 5 hours, determine the speed of the current.\r<BR>\n" );
document.write( "\n" );
document.write( "ANSWER: The speed of the current is ____ mph. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #565071 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=565071\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> boat   	speed	=	15	mph			<BR>\n" );
document.write( "current     	speed	=	x	mph			<BR>\n" );
document.write( "							<BR>\n" );
document.write( "against 	current	=	15	-	x		<BR>\n" );
document.write( "with 	current	=	15	+	x 		<BR>\n" );
document.write( "							<BR>\n" );
document.write( "Total distance =		36	miles 		Total Time=	5.00	hours  <BR>\n" );
document.write( "Time upstream + time downstream =						5	hours  <BR>\n" );
document.write( "							<BR>\n" );
document.write( "36	/(	15	-	x 	)+	36	/(<BR>\n" );
document.write( "36	(	15	+	x 	)+	36	(<BR>\n" );
document.write( "540	+	36	x	+	540	-36	x  <BR>\n" );
document.write( "1080	-	-1125	=			-5	X^2<BR>\n" );
document.write( "-45	=		-5	X^2			<BR>\n" );
document.write( "-5	X^2=	-45					<BR>\n" );
document.write( "x2=	=	9					<BR>\n" );
document.write( "x=   	+/-	3					\r<BR>\n" );
document.write( "\n" );
document.write( "3 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );