document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923126>Question 923126</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hank can wash and wax the car in 2 hours, Sally can do it in 1 hour, 30 minutes, and Hank, Sally, and Lena can <BR>\n" );
document.write( "do it in 40 minutes working together. How long would it take Lena, working alone, to wash and wax the car? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #559881 by </B><A HREF=/tutors/aboutme.mpl?userid=srinivas.g><B>srinivas.g(540)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=srinivas.g><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=srinivas.g><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=559881\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hank can wash and wax the car in 2 hours<BR>\n" );
document.write( "so in 1 hr , he can do   1/2 of the work<BR>\n" );
document.write( "Sally can do it in 1 hour, 30 minutes (1.e 1.5 hr)<BR>\n" );
document.write( "so in 1 hr he can do   1/1.5 of the work<BR>\n" );
document.write( "three persons together can do it in 40 min  ( 40 min  = 40/60  = 2/3 hr)<BR>\n" );
document.write( "three persons together can complete in 2/3 hr<BR>\n" );
document.write( "In 1 hr they can do <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F%282%2F3%29 ALIGN=MIDDLE  ALT=\"1%2F%282%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > work<BR>\n" );
document.write( "                     = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2F2 ALIGN=MIDDLE  ALT=\"3%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > work<BR>\n" );
document.write( "I hr, lena alone can do =  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2F2-+1%2F1.5+-+1%2F2 ALIGN=MIDDLE  ALT=\"+3%2F2-+1%2F1.5+-+1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work  <BR>\n" );
document.write( "                        =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2F2+-1%2F%283%2F2%29+-1%2F2 ALIGN=MIDDLE  ALT=\"3%2F2+-1%2F%283%2F2%29+-1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "                         =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3%2F2-+2%2F3-1%2F2 ALIGN=MIDDLE  ALT=\"+3%2F2-+2%2F3-1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "                 multiply and divide with 6 to each term<BR>\n" );
document.write( "                     = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283%2F2%29+%2A%286%2F6%29-+%282%2F3%29%2A%286%2F6%29-%281%2F2%29%2A%286%2F6%29 ALIGN=MIDDLE  ALT=\"%283%2F2%29+%2A%286%2F6%29-+%282%2F3%29%2A%286%2F6%29-%281%2F2%29%2A%286%2F6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "                      =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283%2F1%29+%2A%283%2F6%29-+%282%2F1%29%2A%282%2F6%29-%281%2F1%29%2A%283%2F6%29 ALIGN=MIDDLE  ALT=\"%283%2F1%29+%2A%283%2F6%29-+%282%2F1%29%2A%282%2F6%29-%281%2F1%29%2A%283%2F6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "                      =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9%2F6-+4%2F6-3%2F6 ALIGN=MIDDLE  ALT=\"9%2F6-+4%2F6-3%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "                        = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%289-4-3%29%2F6 ALIGN=MIDDLE  ALT=\"+%289-4-3%29%2F6\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "                        = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F3 ALIGN=MIDDLE  ALT=\"1%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" > of the work<BR>\n" );
document.write( "so , 1 Hr Lena can do 1/3 of the work<BR>\n" );
document.write( "so to complete full work , lena can take 3 hrs<BR>\n" );
document.write( "so result is 3 hrs<BR>\n" );
document.write( "                     </SPAN>\n" );
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