document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=517045>Question 517045</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane takes the same time to travel 2500 km with the wind as it does to travel 1900 km against the wind. If its speed relative to the air is 450 km/hr, what is 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 #344615 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=344615\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane speed	=	450	mph										<BR>\n" );
document.write( "wind speed	=	x	mph										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "speed against	wind	450	-	x								14.07	<BR>\n" );
document.write( "speed with	wind	450	+	x									<BR>\n" );
document.write( "													<BR>\n" );
document.write( "Distance against	wind	1900	m 										<BR>\n" );
document.write( "Distance with 	wind	2500	m 										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "t=d/r	time against = time with												<BR>\n" );
document.write( "1900/(450-x)=2500/(450+x	)<BR>\n" );
document.write( "1900(450	+x)=2500	(450-x)			<BR>\n" );
document.write( "855000	+	1900	x	=	1125000	-	2500	x 					<BR>\n" );
document.write( "2500	x	1900	x	=	270000								<BR>\n" );
document.write( "4400	x	=	270000										<BR>\n" );
document.write( "/	4400												<BR>\n" );
document.write( "x 	=	61.36	mph	wind speed									<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );