document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=25940>Question 25940</A>: <I><SPAN STYLE=\"word-break: break-all;\"> pls.help me with this. a bank teller counts a certain amount of money in 20 mins, but if she is helped by another teller, they count the money in 15 mins. how long would it take the second teller to count the money alone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #13954 by </B><A HREF=/tutors/aboutme.mpl?userid=wuwei96815><B>wuwei96815(245)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=wuwei96815><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=13954\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If doubling the work force to two tellers does not reduce the work time by half or more, then we must assume that the second teller is slower than the first teller.  The question is how much slower?\r<BR>\n" );
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document.write( "15 minutes/20 minutes = 0.75 = 75%<BR>\n" );
document.write( "So, working together the two tellers were (100% - 75%) or 25% faster than the first teller working alone?\r<BR>\n" );
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document.write( "If we assume that the second teller is responsible for the 25% increase, then we can assume that working alone the second teller will take 25% more time than the first teller or 20 + 25%(20) = 25 minutes.\r<BR>\n" );
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document.write( "So, logic tells us that the second teller will take 25 minutes working alone.<BR>\n" );
document.write( "I hope that is right. </SPAN>\n" );
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