document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=142851>Question 142851</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At 9pm, Lucy started to gallop her horse at 20 miles per hour to catch Edmund, who had a three hour head start, and if Lucy was still 40 miles behind at 11 pm, how fast was Edmund riding?\r<BR>\n" );
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document.write( "(PS: Please show how you got your answer, so I can see how you worked it.  This problem is giving me major problems.  It has been explained to me 2 different ways, but I don't understand either way.  Thanks.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #103946 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=103946\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose, Edmund's speed is 'v' mph.<BR>\n" );
document.write( "By that time Lucy rode for 2 hrs. (9 pm to 11 pm), Edmund rode for ( 2 + 3 =) 5 hrs. (since he started 3 hrs. early).\r<BR>\n" );
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document.write( "By 11 pm Lucy had rode a distance <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5BLu%5D+=+2+x+20+=+40 ALIGN=MIDDLE  ALT=\"S%5BLu%5D+=+2+x+20+=+40\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph. <BR>\n" );
document.write( "By 11 pm Edmund had rode a distance <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S%5BEd%5D+=+5+x+v+=+5v ALIGN=MIDDLE  ALT=\"S%5BEd%5D+=+5+x+v+=+5v\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph. \r<BR>\n" );
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document.write( "Since, still Lucy is 40 miles behind then, <BR>\n" );
document.write( "Distance covered by Lucy + 40 miles = Distance covered by Edmund<BR>\n" );
document.write( "40 + 40 = 5v<BR>\n" );
document.write( "5v = 80<BR>\n" );
document.write( "v = 80/5 = 16\r<BR>\n" );
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document.write( "Hence, Edmund rode at the speed 16 mph. </SPAN>\n" );
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