document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=523968>Question 523968</A>: <I><SPAN STYLE=\"word-break: break-all;\"> an airplane flew with the wind for 2.5 hours and returned the same distance against the wind in 3.5 hours. if the engine speed of the plane was a constant 360 mph in air, how fast was the wind blowing? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #347495 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=347495\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> an airplane flew with the wind for 2.5 hours and returned the same distance against the wind in 3.5 hours. if the engine speed of the plane was a constant 360 mph in air, how fast was the wind blowing?<BR>\n" );
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document.write( "1st I've heard of \"engine speed\"<BR>\n" );
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document.write( "d = r*t<BR>\n" );
document.write( "a = airspeed, w = windspeed<BR>\n" );
document.write( "d = 2.5*(a + w) = 3.5*(a - w)<BR>\n" );
document.write( "2.5*(360 + w) = 3.5*(360 - w)<BR>\n" );
document.write( "900 + 2.5w = 1260 - 3.5w<BR>\n" );
document.write( "6w = 360<BR>\n" );
document.write( "w = 60 mi/hr<BR>\n" );
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