document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=341351>Question 341351</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a race from pt. X to pt Y and back, Jack averages 30miles/hr to pt Y and 10 miles/hr back to pr X.Sandy averages 20 miles/hr in both directions. If Jack and Sandy start race at same tym, who’ll finish 1st ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #244419 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=244419\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  In a race from pt. X to pt Y and back, Jack averages 30miles/hr to pt Y and 10 miles/hr back to pr X.Sandy averages 20 miles/hr in both directions. If Jack and Sandy start race at same tym, who’ll finish 1st ?<BR>\n" );
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document.write( "d = distance<BR>\n" );
document.write( "Jack's time = d/30 + d/10 = 4d/30 = 2d/15 = 0.1333... d<BR>\n" );
document.write( "Sandy's time = d/20 + d/20 = d/10 = 0.1d<BR>\n" );
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document.write( "This is the basis of the Michelson-Morley experiment that disproved the existence of the \"ether\", I think in the early 1900's.<BR>\n" );
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