document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1202478>Question 1202478</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cross-country team left school and trotted to the duck pond at 3 mph. Then they ran back to the school at 7 mph. If the total trip took 10 hours, how far was it to the duck pond? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #837340 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13215)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=837340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The distances to the duck pond and back are the same, so the ratio of times at the two speeds is the opposite of the ratio of speeds.<br><BR>\n" );
document.write( "The ratio of the two speeds was 3:7, so the ratio of times was 7:3.  Since the total time was 10 hours, simple reasoning says they spent 7 hours going and 3 hours returning.<br><BR>\n" );
document.write( "7 hours at 3 mph means the distance was 21 miles; likewise, 3 hours at 7 mph means the distance was 21 miles.<br><BR>\n" );
document.write( "ANSWER: 21 miles<br><BR>\n" );
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