document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=368822>Question 368822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if it takes an airplane 3 hrs to fly 360 mi with the wind and 4 h to make the return trip against the wind find the speed of the wind and the air speed of the airplane. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #262783 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=262783\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let speed of plane in still air be x<BR>\n" );
document.write( "speed of wind be y<BR>\n" );
document.write( "..<BR>\n" );
document.write( "speed with wind = x+y<BR>\n" );
document.write( "speed against wind = x-y<BR>\n" );
document.write( "...<BR>\n" );
document.write( "distance with wind =360 miles<BR>\n" );
document.write( "time = 3 hours<BR>\n" );
document.write( "d/r = t<BR>\n" );
document.write( "360/(x+y)=3<BR>\n" );
document.write( "360 = 3x+3y<BR>\n" );
document.write( "/3<BR>\n" );
document.write( "120=x+y......................1<BR>\n" );
document.write( "...<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Distance against wind = 360 miles<BR>\n" );
document.write( "time = 4<BR>\n" );
document.write( "speed = x-y<BR>\n" );
document.write( "...<BR>\n" );
document.write( "360/(x-y)=4<BR>\n" );
document.write( "/4<BR>\n" );
document.write( "90/(x-y)=1<BR>\n" );
document.write( "x-y = 90.................2<BR>\n" );
document.write( "add 1 & 2<BR>\n" );
document.write( "2x=210<BR>\n" );
document.write( "/2<BR>\n" );
document.write( "x= 105 mph speed of plane<BR>\n" );
document.write( "speed of wind = 120-105=15 mph.\r<BR>\n" );
document.write( "\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );