document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=966234>Question 966234</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane can fly at a rate of 215 mph in calm air. Traveling with the wind, the plane flew 750 miles in the same amount of time it took to fly 540 miles against the wind. Find the rate 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 #590556 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=590556\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A plane can fly at a rate of 215 mph in calm air. Traveling with the wind, the plane flew 750 miles in the same amount of time it took to fly 540 miles against the wind. Find the rate of the wind.<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let c=rate of wind<BR>\n" );
document.write( "215+c=rate of plane with wind<BR>\n" );
document.write( "215-c=rate of plane against wind<BR>\n" );
document.write( "travel time=distance/rate (same for both planes)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "750/(215+c)=540/(215-c)<BR>\n" );
document.write( "cross multiply:<BR>\n" );
document.write( "540(215+c)=750(215-c)<BR>\n" );
document.write( "116100+540c=161250-750c<BR>\n" );
document.write( "1290c=45150<BR>\n" );
document.write( "c=35<BR>\n" );
document.write( "rate of wind=35 mph<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );