document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=879100>Question 879100</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two men A and B walk from P to Q  a distance of 'D' at S1 and S2 km per hour. B reaches Q,returns immediately and meets A at R,find the distance from P to Q. I need an explanation for this rather than mere formula. thank you in advance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #530686 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=530686\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Two men A and B walk from P to Q a distance of 'D' at S1 and S2 km per hour. B reaches Q,returns immediately and meets A at R,find the distance from P to Q.<BR>\n" );
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document.write( "When they meet:<BR>\n" );
document.write( "A: travels (D-R)<BR>\n" );
document.write( "B: travels (D+R)<BR>\n" );
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document.write( "Their travel time is the same; write a time equation: time = dist/speed<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28D-R%29%2F%28S1%29 ALIGN=MIDDLE  ALT=\"%28D-R%29%2F%28S1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28D%2BR%29%2F%28S2%29 ALIGN=MIDDLE  ALT=\"%28D%2BR%29%2F%28S2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cross multiply<BR>\n" );
document.write( "S2(D-R) = S1(D+R)<BR>\n" );
document.write( "S2D - S2R = S1D + S1R<BR>\n" );
document.write( "S2D - S1D = S1R + S2R<BR>\n" );
document.write( "Factor out D & R<BR>\n" );
document.write( "D(S2-S1) = R(S1+S2)<BR>\n" );
document.write( "D = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28R%28S1%2BS2%29%29%2F%28%28S2-S1%29%29 ALIGN=MIDDLE  ALT=\"%28R%28S1%2BS2%29%29%2F%28%28S2-S1%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the distance from P to Q </SPAN>\n" );
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