document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=733664>Question 733664</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 20 men or 30 boys can do a certain job in 20 days. how long will it take 6 men and 15 boys 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 #448646 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=448646\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  20 men or 30 boys can do a certain job in 20 days.<BR>\n" );
document.write( "Find how many man-days or boy-days to do the job<BR>\n" );
document.write( "20*20 = 400 man-days<BR>\n" );
document.write( "or<BR>\n" );
document.write( "20*30 = 600 boy-days<BR>\n" );
document.write( "therefore<BR>\n" );
document.write( "400md = 600 bd<BR>\n" );
document.write( "m = 600bd/400d<BR>\n" );
document.write( "m = 1.5b<BR>\n" );
document.write( "a man accomplishes 1.5 times as much as a boy in 1 hr <BR>\n" );
document.write( ":<BR>\n" );
document.write( " how long will it take 6 men and 15 boys to do the same job ?<BR>\n" );
document.write( "let t = no. of days to do this (in terms of boy-days)<BR>\n" );
document.write( "6t(1.5) + 15t = 600 <BR>\n" );
document.write( "9t + 15t = 600<BR>\n" );
document.write( "24t = 600<BR>\n" );
document.write( "t = 600/24<BR>\n" );
document.write( "t = 25 days to complete the job </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );