document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=624610>Question 624610</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Aplane travels 250 mph in still air. The plane goes 560 miles with wind and 440 miles against wind in the same time. What is speed of wind? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #392936 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=392936\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Aplane travels 250 mph in still air. The plane goes 560 miles with wind and 440 miles against wind in the same time. What is speed of wind?<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let w=speed of wind<BR>\n" );
document.write( "250+w=speed of plane downwind<BR>\n" );
document.write( "250-w=speed of plane against wind<BR>\n" );
document.write( "Travel time=distance/speed<BR>\n" );
document.write( "..<BR>\n" );
document.write( "560/(250+w)=440/(250-w)<BR>\n" );
document.write( "560*250-560w=440*250+440w<BR>\n" );
document.write( "560*250-440*250=440w+560w<BR>\n" );
document.write( "1000w=250(560-440)=250*120=30000<BR>\n" );
document.write( "w=30<BR>\n" );
document.write( "speed of wind=30 mph\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );