document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1055172>Question 1055172</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jill's plane can fly 150 mph without any wind. She flies 1800 miles against the wind to visit her mother, than flies another 1800 miles back home with the wind. If the total flight time was 25 hours what was the speed of the wind. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #670362 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel555><B>jorel555(1290)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel555><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=670362\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let w stand for windspeed. Then:<BR>\n" );
document.write( "1800/(150+w)+1800/(150-w)=25<BR>\n" );
document.write( "1800(150-w)+1800(150+w)=25(22500-w²)<BR>\n" );
document.write( "25w²-22500=0<BR>\n" );
document.write( "w²=900<BR>\n" );
document.write( "w=30,-30<BR>\n" );
document.write( "Throwing out the negative result, we get the wind speed to be 30 mph. &#9786;&#9786;&#9786;&#9786; </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );