document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=360595>Question 360595</A>: <I><SPAN STYLE=\"word-break: break-all;\"> aircraft travels 864 miles with the wind in 4 hours and the same distance against the wind in 6 hours. 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 #257303 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=257303\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> aircraft travels 864 miles with the wind in 4 hours and the same distance against the wind in 6 hours. What is the speed of the wind?<BR>\n" );
document.write( "...<BR>\n" );
document.write( "plane speed in still air =x<BR>\n" );
document.write( "wind speed = y<BR>\n" );
document.write( "...<BR>\n" );
document.write( "with wind speed = x+y<BR>\n" );
document.write( "against wind speed = x-y<BR>\n" );
document.write( "...<BR>\n" );
document.write( "t=d/r<BR>\n" );
document.write( "864/(x+y)=4<BR>\n" );
document.write( "864=4x+4y<BR>\n" );
document.write( "/4<BR>\n" );
document.write( "216=x+y....................1<BR>\n" );
document.write( "..<BR>\n" );
document.write( "864/(x-y)=6<BR>\n" );
document.write( "6x-6y=864<BR>\n" );
document.write( "x-y=144.......................2<BR>\n" );
document.write( "add both equations<BR>\n" );
document.write( "..<BR>\n" );
document.write( "2x=360<BR>\n" );
document.write( "x= 180 mph speed of plane<BR>\n" );
document.write( "y = 36 speed of wind<BR>\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
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