document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=993623>Question 993623</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A pilot flew a jet from A to B, a difference of 2500 km. On the return trip, the average speed was 20% faster than the out-bound trip. The round-trip took 9 hours and 10 minutes. What was the speed (in kph) from A to B? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #612846 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=612846\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A pilot flew a jet from A to B, a difference of 2500 km. On the return trip, the average speed was 20% faster than the out-bound trip. The round-trip took 9 hours and 10 minutes. What was the speed (in kph) from A to B?<BR>\n" );
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document.write( "A to B DATA:<BR>\n" );
document.write( "dist = 2500 km ; rate = 1.2x ; time = 2500/1.2x hrs<BR>\n" );
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document.write( "B to A DATA:<BR>\n" );
document.write( "dist = 2500 km ; rate = x km/h ; time = 2500/x hrs<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "2500/1.2x + 2500/x = 9.167 hrs<BR>\n" );
document.write( "2500x + 2500*1.2x = 9.167x(1.2)x<BR>\n" );
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document.write( "5500x = 11x^2<BR>\n" );
document.write( "11x(x-500) = 0<BR>\n" );
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document.write( "Positive solution:<BR>\n" );
document.write( "x = 500<BR>\n" );
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document.write( "Ans: A to B rate = 1.2*500 = 600 km/h<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "----------- </SPAN>\n" );
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