document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=518742>Question 518742</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flies 720 miles with the wind.  In the same amount of time, it can fly 630 miles againt the wind.  The speed of the plane still air is 225 mph.  Find the speed of the wind. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #345251 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=345251\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane speed	=	225	mph										<BR>\n" );
document.write( "wind speed	=	x	mph										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "speed against	wind	225	-	x					<BR>\n" );
document.write( "speed with	wind	225	+	x									<BR>\n" );
document.write( "													<BR>\n" );
document.write( "Distance against	wind	630	m 										<BR>\n" );
document.write( "Distance with 	wind	720	m 										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "t=d/r	time against = time with												<BR>\n" );
document.write( "630	/	(	225	-	x)=	720/(	225+x	)<BR>\n" );
document.write( "630 (	225+	x)=	720	( 	225	-x	)			<BR>\n" );
document.write( "141750	+	630	x	=	162000	-	720	x 					<BR>\n" );
document.write( "720	x	630	x	=	20250								<BR>\n" );
document.write( "1350	x	=	20250										<BR>\n" );
document.write( "/	1350												<BR>\n" );
document.write( "x 	=	15	mph	wind speed									<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );