document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=415704>Question 415704</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At full speed, an airplane can travel 4500 miles with the wind in 6 hours, but it requires 10 hours to travel the same distance against the wind. What is the wind speed in miles per hour? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #291364 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=291364\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let s=speed of plane, w=speed of wind<BR>\n" );
document.write( "Then (1) s + w = 4500 mi/6 hr = 750 mph (with the wind)<BR>\n" );
document.write( "And (2) s - w = 4500mi/10 hr = 450 mph (against the wind)<BR>\n" );
document.write( "Subtracting (2) from (1) gives 2s = 300 mph or s = 150 mph<BR>\n" );
document.write( "So wind speed = 150 miles per hour </SPAN>\n" );
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