document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1202398>Question 1202398</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat traveled 280 miles downstream and back. The trip downstream took 14 hours. The trip back took 140 hours. Find the speed of the boat in still water 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 #837193 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=837193\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "Let boat	speed	=x	mph	in still water				<BR>\n" );
document.write( "Let current 	speed	=y	mph					<BR>\n" );
document.write( "against current  x-y		time taken 140.00	hours					<BR>\n" );
document.write( "with wind  x+y		time taken 14.00	hours					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "Distance = same=		140	miles					<BR>\n" );
document.write( "t=d/r		\r<BR>\n" );
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document.write( "Upstream time equation		<BR>\n" );
document.write( "				<BR>\n" );
document.write( "140	/	(	x	-	y	)=	140.00	\r<BR>\n" );
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document.write( "Downstream  time equation\r<BR>\n" );
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document.write( "140.00	/(	x	+	1	y)	=	14.00	\r<BR>\n" );
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document.write( "	x		1y	=	1.00	....................1	\r<BR>\n" );
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document.write( "140	/	(	x-		y	)=	14.00	<BR>\n" );
document.write( "140	/(	x	-	1	y)	=	14.00	\r<BR>\n" );
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document.write( "	x	-	y	=	10.00	...............2	\r<BR>\n" );
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document.write( "Multiply (1) by	1.00							<BR>\n" );
document.write( "Multiply (2) by	1.00							<BR>\n" );
document.write( "we get								<BR>\n" );
document.write( "	x	+	y	=	1		<BR>\n" );
document.write( "x	-	y	=	10		<BR>\n" );
document.write( "2	x	=	11	<BR>\n" );
document.write( "				<BR>\n" );
document.write( "/	2<BR>\n" );
document.write( "							<BR>\n" );
document.write( "x	=	5.5	mph					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "plug value of x in (1)	<BR>\n" );
document.write( "							<BR>\n" );
document.write( "x		-	y	=	1		<BR>\n" );
document.write( "5.5			-	y	=	1.00		<BR>\n" );
document.write( "-y	=	1.00	-5.5				<BR>\n" );
document.write( "-1	y	=	-4.50					<BR>\n" );
document.write( "	y	=	4.5	mph		\r<BR>\n" );
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document.write( "Complete by writing the answer		<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );