document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=26010>Question 26010</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me with this problem: Helped by a strong jet stream, a Los Angeles-to-Boston plane flew 10% faster than usual and made the 4400 km trip in 30 minutes less time than usual. At what speed does the plane usually fly?\r<BR>\n" );
document.write( "\n" );
document.write( "Thank you!<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #14361 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=14361\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Usual Flight Data:<BR>\n" );
document.write( "distance=1400; rate=x mph; time=d/r=1400/x hrs.<BR>\n" );
document.write( "Faster Flight Data:<BR>\n" );
document.write( "distance=1400; rate=1.1xmph; time=d/r=1400/1.1x<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "Usual time-Faster time= 2/3 hr<BR>\n" );
document.write( "(1400/x) - (1400-1.1x)= 2/3<BR>\n" );
document.write( "Divide by 1400 to get:<BR>\n" );
document.write( "1/x - 1/1.1x =1/2100<BR>\n" );
document.write( "(1.1x-x)/(1.1x^2)= 1/2100<BR>\n" );
document.write( "0.1x/1.1x^2= 1/2100<BR>\n" );
document.write( "0.1/1.1x=1/2100<BR>\n" );
document.write( "1.1x=210<BR>\n" );
document.write( "x=190.90 (usual speed of the plane)<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );