document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=344122>Question 344122</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flies 490 miles with the wind and 330 against the wind in the same length of time. If the speed of the wind is 20, what is the speed of the airplane in still air? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #246263 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=246263\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> D=RT<BR>\n" );
document.write( "490=(R+20)T<BR>\n" );
document.write( "T=490/(R+20)<BR>\n" );
document.write( "330=(R-20)T<BR>\n" );
document.write( "T=330/(R-20)<BR>\n" );
document.write( "490/(R+20)=330/(R-20) CROSS MULTIPLY.<BR>\n" );
document.write( "490(R-20)=330(R+20)<BR>\n" );
document.write( "490R-9,800=330T+6,600<BR>\n" );
document.write( "490R-330R=6,600+9,800<BR>\n" );
document.write( "160R=16,400<BR>\n" );
document.write( "R=16,400/160<BR>\n" );
document.write( "R=102.5 MPH IS THE PLANES SPEED IN STILL AIR.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "490/(102.5+20)=330/(102.5-20)<BR>\n" );
document.write( "490/122.5=330/82.5<BR>\n" );
document.write( "4=4 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );