document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=998223>Question 998223</A>: <I><SPAN STYLE=\"word-break: break-all;\">  An airplane travels 1800 miles in 2.5 hours with the aid of a tail wind. It takes 3 hours for the return trip, flying against the same wind. Find the speed of the airplane in the still wind, and the speed of the wind. Airplane speed:___________miles per hour Wind speed:____________miles per hour, </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #616066 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=616066\">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   	3	hours					<BR>\n" );
document.write( "with	wind   	2.5	hours					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "Distance against 		1800	miles	distance with 		1800	miles	<BR>\n" );
document.write( "t=d/r	against	wind   		-				<BR>\n" );
document.write( "1800	/	(	x	-	y	)=	3	<BR>\n" );
document.write( "3	(	x	-	y	)	=	1800	<BR>\n" );
document.write( "3	x	-	3	y	=	1800	....................1	<BR>\n" );
document.write( "								<BR>\n" );
document.write( "1800	/	(	x	+	y	)=	2.50	<BR>\n" );
document.write( "2.50	(	x	+	y	)	=	1800	<BR>\n" );
document.write( "2.50	x	+	2.50	y	=	1800	...............2	<BR>\n" );
document.write( "Multiply (1) by	2 1/2							<BR>\n" );
document.write( "Multiply (2) by	3							<BR>\n" );
document.write( "we get								<BR>\n" );
document.write( "7.50	x	+	-8	y	=	4500		<BR>\n" );
document.write( "7.50	x	+	8	y	=	5400		<BR>\n" );
document.write( "15	x	=	9900					<BR>\n" );
document.write( "/	15							<BR>\n" );
document.write( "x	=	660	mph 					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "plug value of x in (1)								<BR>\n" );
document.write( "3	x		-3	y	=	1800		<BR>\n" );
document.write( "1980			-3	y	=	1800		<BR>\n" );
document.write( "-3	y	=	1800	-1980				<BR>\n" );
document.write( "-3	y	=	-180	mph				<BR>\n" );
document.write( "	y	=	60					<BR>\n" );
document.write( "Plane  	speed	660	mph 					<BR>\n" );
document.write( "wind   	speed	60	mph 					<BR>\n" );
document.write( "								<BR>\n" );
document.write( "m.ananth@hotmail.ca								     <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );