document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=377396>Question 377396</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2800 km trip<BR>\n" );
document.write( "New plane flies 100 km faster<BR>\n" );
document.write( "Trip time reduced 30 minutes\r<BR>\n" );
document.write( "\n" );
document.write( "What is speed of new plane? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #268208 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=268208\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> distance = 2800 km<BR>\n" );
document.write( "let speed of plane be x<BR>\n" );
document.write( "time taken = 2800/x<BR>\n" );
document.write( "...\r<BR>\n" );
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document.write( "New plane speed = x+100<BR>\n" );
document.write( "time= 2800/(x+100)<BR>\n" );
document.write( "2800/x - 2800/(x+100)= 1/2<BR>\n" );
document.write( "..<BR>\n" );
document.write( "LCD = x(x+100)<BR>\n" );
document.write( "(<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282800%28x%2B100%29-2800x%29%2F%28x%28x%2B100%29%29=1%2F2%29 ALIGN=MIDDLE  ALT=\"%282800%28x%2B100%29-2800x%29%2F%28x%28x%2B100%29%29=1%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "cross multiply<BR>\n" );
document.write( "..<BR>\n" );
document.write( "2(2800x+280000-2800x)=x(x+100)<BR>\n" );
document.write( "2*280,000=x^2+100x<BR>\n" );
document.write( "x^2+100x-560,000 =0<BR>\n" );
document.write( "x^2+800x-700x-560,000=0<BR>\n" );
document.write( "x(x+800)-700(x+800)=0<BR>\n" );
document.write( "(x+800)(x-700)=0<BR>\n" );
document.write( "x=-800<BR>\n" );
document.write( "OR x= 700<BR>\n" );
document.write( "..<BR>\n" );
document.write( "The speed of new plane = 700+100 = 800 kmph<BR>\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
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