document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163873>Question 1163873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr Wong drove from his home to Mr Lee’s house in happy down at an average speed of 80 km/h. His speed for the last 1/4 of the journey was 7/8 of his average speed for the whole journey. If he took 2 1/2 hours for the last 1/4 of the journey how long did it take to travel from his home to Mr Lee’s house? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #788124 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=788124\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let d = the total distance traveled<BR>\n" );
document.write( "During the last 1/4 of the journey, the average speed was (7/8)*80 = 70 km/h<BR>\n" );
document.write( "It took 2.5 h to travel d/4.  Thus (d/4)/70 = 2.5 -> d = 700 km<BR>\n" );
document.write( "The total time is given by the distance traveled divided by the avg. speed:<BR>\n" );
document.write( "t = 700/80 = 8.75 hours<BR>\n" );
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