document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=388500>Question 388500</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a plane flies 1200 miles in 2 hours with the jet stream and returns the same distance in two and a half hours 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 #274836 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=274836\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The key to most of these types of problems is to determine an equality.  In this case, the equality is the speed of the plane in still air.\r<BR>\n" );
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document.write( "speed of plane downwind = 1200/2 = 600 mi/h<BR>\n" );
document.write( "speed of plane against the wind =1200/2.5=480 mi/hr\r<BR>\n" );
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document.write( "downwind speed - wind speed = against the wind speed + wind speed<BR>\n" );
document.write( "let x = wind speed<BR>\n" );
document.write( "600-x=480+x<BR>\n" );
document.write( "2x=120<BR>\n" );
document.write( "x=60<BR>\n" );
document.write( "ans: wind speed is 60 mi/hr </SPAN>\n" );
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