document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1153778>Question 1153778</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane can fly 650 mph in still air. If it can travel 2800 miles with the wind in the same time it can travel 2400 miles against the wind, find the wind speed. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #776061 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=776061\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An airplane can fly 650 mph in still air. If it can travel 2800 miles with the wind in the same time it can travel 2400 miles against the wind, find the wind speed.<BR>\n" );
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document.write( "a = plane's airspeed = 650<BR>\n" );
document.write( "w = windspeed<BR>\n" );
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document.write( "t = 2800/(650+w) = 2400/(650-w)<BR>\n" );
document.write( "2800*(650-w) = 2400*(650+w)<BR>\n" );
document.write( "7*(650-w) = 6*(650+w)<BR>\n" );
document.write( "4550 - 7w = 3900 + 6w<BR>\n" );
document.write( "13w = 650<BR>\n" );
document.write( "w = 50\r<BR>\n" );
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