document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1010198>Question 1010198</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane can fly 90 miles against the wind in the same time it takes to fly 110 miles with the wind. If the wind speed is 25 mph, 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 #626355 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=626355\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Rate times time equals distance, or rt=d and t = d/r.<BR>\n" );
document.write( "Call the rate of the plane in still air, r.  Then we write<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=90%2F%28r-25%29+=+110%2F%28r%2B25%29 ALIGN=MIDDLE  ALT=\"90%2F%28r-25%29+=+110%2F%28r%2B25%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now cross-multiply and solve giving us<BR>\n" );
document.write( "90(r+25) = 110(r-25)<BR>\n" );
document.write( "90r + 2250 = 110r - 2750<BR>\n" );
document.write( "-20r = - 5000<BR>\n" );
document.write( "r = 250 mph </SPAN>\n" );
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