document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=512188>Question 512188</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Commercial jet can fly 500 mph in calm air.  Traveling with the wids of the jet stream, the plane flew 2420 miles in the same amount of time as it takes to fly 1580 miles against the jet stream.  What is the rate of the speed of the jet stream? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #342578 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=342578\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plane speed	=	500	mph										<BR>\n" );
document.write( "wind speed	=	x	mph																							<BR>\n" );
document.write( "speed against	wind	500	-	x								11.7	<BR>\n" );
document.write( "speed with	current	500	+	x									<BR>\n" );
document.write( "													<BR>\n" );
document.write( "Distance against	current	1580	m 										<BR>\n" );
document.write( "Distance with 	current	2420	m 										<BR>\n" );
document.write( "													<BR>\n" );
document.write( "t=d/r	time against = time with												<BR>\n" );
document.write( "1580/(	500	-x)=	2420	/(500	+	x	)<BR>\n" );
document.write( "1580	(	500	+	x	)=	2420	(500-x)			<BR>\n" );
document.write( "790000	+	1580	x	=	1210000	-	2420	x 					<BR>\n" );
document.write( "2420	x	1580	x	=	420000								<BR>\n" );
document.write( "4000	x	=	420000										<BR>\n" );
document.write( "/	4000												<BR>\n" );
document.write( "x 	=	105	mph	wind speed									<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );