document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204438>Question 204438</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/1405802111/algebrahomeworkh>Longman Mathematics for IGCSE Book1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Carly is training by running to a post across a field and then back. She runs the outward leg at 7m/s and the return leg at 5m/s. She takes 15.4seconds. Find the distance to the post. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154339 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=154339\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Carly is training by running to a post across a field and then back. She runs the outward leg at 7m/s and the return leg at 5m/s. She takes 15.4seconds. Find the distance to the post.<BR>\n" );
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document.write( "d = rt<BR>\n" );
document.write( "t = d/r<BR>\n" );
document.write( "15.4 = d/7 + d/5<BR>\n" );
document.write( "15.4 = (5d + 7d)/35<BR>\n" );
document.write( "12d = 35*15.4 = 539<BR>\n" );
document.write( "d = 539/12 m (almost 45 meters)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );