document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908100>Question 908100</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A turboprop plane flying with the wind flew 960 mi in 3 h. Flying against the wind, the plane required 4 h to travel the same distance. Find the rate of the wind and the rate of the plane in calm air. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #550810 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=550810\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane	speed	=x	mph						<BR>\n" );
document.write( "wind   	speed	=y	mph						<BR>\n" );
document.write( "against  	wind   	4	hours						<BR>\n" );
document.write( "with	wind   	3	hours						<BR>\n" );
document.write( "									<BR>\n" );
document.write( "Distance against 		960	miles	distance with 		960	miles		<BR>\n" );
document.write( "t=d/r	against	wind   		-					<BR>\n" );
document.write( "960.00	/	(	x	-	y	)=	4.00		<BR>\n" );
document.write( "4.00	(	x	-	y	)	=	3.00		<BR>\n" );
document.write( "4.00	x	-	4.00	y	=	960.00	....................1		<BR>\n" );
document.write( "									<BR>\n" );
document.write( "960.00	/	(	x	+	y	)=	3.00		<BR>\n" );
document.write( "3.00	(	x	+	y	)	=	960.00		<BR>\n" );
document.write( "3.00	x	+	3.00	y	=	960.00	...............2		<BR>\n" );
document.write( "Multiply (1) by	3.00								<BR>\n" );
document.write( "Multiply (2) by	4.00								<BR>\n" );
document.write( "we get									<BR>\n" );
document.write( "12.00	x	+	-12.00	y	=	2880.00			<BR>\n" );
document.write( "12.00	x	+	12.00	y	=	3840.00			<BR>\n" );
document.write( "24.00	x	=	6720.00						<BR>\n" );
document.write( "/	24.00								<BR>\n" );
document.write( "x	=	280.00	mph						<BR>\n" );
document.write( "									<BR>\n" );
document.write( "plug value of x in (1)				y					<BR>\n" );
document.write( "4.00	x		-4.00	y	=	960.00			<BR>\n" );
document.write( "1120.00			-4.00	-1120.00	=	960.00			<BR>\n" );
document.write( "-4.00	y	=	960.00						<BR>\n" );
document.write( "-4.00	y	=	-160.00	mph					<BR>\n" );
document.write( "	y	=	40.00						<BR>\n" );
document.write( "plane	speed	280.00	mph						<BR>\n" );
document.write( "wind   	speed	40.00	mph						<BR>\n" );
document.write( "									<BR>\n" );
document.write( "m.ananth@hotmail.ca								     	<BR>\n" );
document.write( "									<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );