document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=715480>Question 715480</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In his motorboat, Bill travels upstream at top speed to his favorite fishing spot, a distance of 36 miles. It takes him 2 hours. Returning, he finds that the trip downstream, still at top speed, only takes 1.5 hours. Find the speed of Bill's boat and the speed of the current. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #439479 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=439479\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Boat speed	speed	=x	mph					<BR>\n" );
document.write( "current     	speed	=y	mph					<BR>\n" );
document.write( "against 	current     	2	hours					<BR>\n" );
document.write( "with 	current     	1.5	hours					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "Distance with	current     	36	miles		distance against	current     	36	<BR>\n" );
document.write( "t=d/r	against	current     	(x-y)					<BR>\n" );
document.write( "36.00	/	(	x	-	y	)=	2.00	<BR>\n" );
document.write( "								<BR>\n" );
document.write( "2.00	x	-	-2.00	y	=	36.00	....................1	<BR>\n" );
document.write( "with	current     	(x+y)						<BR>\n" );
document.write( "36.00	/	(	x	+	y	)=	1.50	<BR>\n" );
document.write( "1.50	(	x	+	y	)	=	36.00	<BR>\n" );
document.write( "1.50	x	+	1.50	y	=	36.00	...............2	<BR>\n" );
document.write( "Multiply (1) by	1.50							<BR>\n" );
document.write( "Multiply (2) by	2.00							<BR>\n" );
document.write( "we get	2.00							<BR>\n" );
document.write( "3.00	x	+	-3.00	y	=	54.00		<BR>\n" );
document.write( "3.00	x	+	3.00	y	=	72.00		<BR>\n" );
document.write( "6.00	x	=	126.00					<BR>\n" );
document.write( "/	6.00							<BR>\n" );
document.write( "x	=	21	mph					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "plug value of x in (1)				y				<BR>\n" );
document.write( "2	x		-2	y	=	36		<BR>\n" );
document.write( "42			-2	-42	=	36		<BR>\n" );
document.write( "-2	y	=	36					<BR>\n" );
document.write( "-2	y	=	-6	mph				<BR>\n" );
document.write( "	y	=	3					<BR>\n" );
document.write( "Boat speed	21	mph						<BR>\n" );
document.write( "current     	3	mph						<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );