document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=435325>Question 435325</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an airplane flies 500 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 40, what is the speed of the airplane in still air? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #301735 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=301735\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> an airplane flies 500 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 40, what is the speed of the airplane in still air<BR>\n" );
document.write( "..<BR>\n" );
document.write( "let x=speed of plane in still air<BR>\n" );
document.write( "(x+40)=speed of plane with the wind<BR>\n" );
document.write( "(x-40)=speed of plane against the wind<BR>\n" );
document.write( "Travel time = distance/speed<BR>\n" );
document.write( "500/(x+40)=340/(x-40)<BR>\n" );
document.write( "500(x-40)=340(x+40)<BR>\n" );
document.write( "500x-20000=340x+13600<BR>\n" );
document.write( "160x=33600<BR>\n" );
document.write( "x=210<BR>\n" );
document.write( "ans:<BR>\n" );
document.write( "speed of the airplane in still air=210 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );