document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=850682>Question 850682</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary works 2.5 times faster than peter.together,they do a job in 12.5 hours.how long does it take mary working alone to do the same job? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #512302 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=512302\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mary works 2.5 times faster than peter.together,they do a job in 12.5 hours.how long does it take mary working alone to do the same job?<BR>\n" );
document.write( "***<BR>\n" );
document.write( "let x=time it takes peter to finish the job working alone<BR>\n" );
document.write( "1/x=his work rate<BR>\n" );
document.write( "2.5/x=mary's work rate<BR>\n" );
document.write( "1/12.5=work rate peter and mary working together to finish the job<BR>\n" );
document.write( "..<BR>\n" );
document.write( "sum of indv. work rates=work rate working together<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Fx%2B2.5%2Fx=1%2F12.5 ALIGN=MIDDLE  ALT=\"1%2Fx%2B2.5%2Fx=1%2F12.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "3.5/x=1/12.5<BR>\n" );
document.write( "x=43.75<BR>\n" );
document.write( "hours it takes mary working alone to do the same job=43.75/2.5=17.5<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );