document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=26328>Question 26328</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I was wondering if you could help me with this problem. I need it as soon as possible. Thank you! A train averaged 120 km/h for the first two thirds of a trip and 100 km/h for the whole trip. Find its average speed for the last third of the trip. I think the answer is 75km/h but i don't know how to set it up. Thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #14169 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=14169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A train averaged 120 km/h for the first two thirds of a trip and 100 km/h for the whole trip. Find its average speed for the last third of the trip. I think the answer is 75km/h but i don't know how to set it up. Thank you.<BR>\n" );
document.write( "LET THE TRIP BE FOR SAY X KM.<BR>\n" );
document.write( "2/3 RD. OF TRIP =X*2/3=2X/3 KM.....IT TRAVELLED AT 120 KMPH<BR>\n" );
document.write( "SO TIME TAKEN = 2X/(3*120)=X/180 HRS.<BR>\n" );
document.write( "WHOLE TRIP AVERAGE SPEED =100 KMPH ..SO TIME TAKEN FOR WHOLE TRIP = X/100 HRS.<BR>\n" );
document.write( "SO TIME TAKEN FOR 1/3 RD. OF TRIP=X/100 - X/180 =X(180-100)/18000=X/225 HRS.<BR>\n" );
document.write( "DISTANCE TRAVELLED =X*1/3=X/3<BR>\n" );
document.write( "SO AVERAGE SPEED FOR THIS PART = (X/3)/(X/225)=225/3 =75 KMPH </SPAN>\n" );
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