document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=374249>Question 374249</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Delta 727 travelled 560mph with the wind and 480mph against the wind. Find the speed of the plane in still air and 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 #266351 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=266351\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let speed of plane in still air be x mph<BR>\n" );
document.write( "speed of wind be y mph<BR>\n" );
document.write( "time = d/r<BR>\n" );
document.write( "with wind time<BR>\n" );
document.write( "560/(x+y)=1<BR>\n" );
document.write( "x+y =560........................1<BR>\n" );
document.write( "...<BR>\n" );
document.write( "against wind  time <BR>\n" );
document.write( "480/(x-y)=1\r<BR>\n" );
document.write( "\n" );
document.write( "x-y =480........................2\r<BR>\n" );
document.write( "\n" );
document.write( "add the two equations (1)&(2)<BR>\n" );
document.write( "2x=1040<BR>\n" );
document.write( "/2<BR>\n" );
document.write( "x=1040/2<BR>\n" );
document.write( "x= 520 mph speed of plane in still air<BR>\n" );
document.write( "y= 40 mph  speed of wind<BR>\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );