document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=194440>Question 194440</A>: <I><SPAN STYLE=\"word-break: break-all;\"> CAN SOMEONE PLEASE HELP ME WITH THIS ONE???<BR>\n" );
document.write( "I need to drain a pool. I know one pump can drain the pool in 8min and if I use a second pump I can drain the pool in 4min. The problem is the first pump is being used so I can only use the second pump. So I need to know how long it will take me to drain the pool using only the second pump?\r<BR>\n" );
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document.write( "I've tried a few different ways to solve this and nothing comes up right..Thank you, thank you, thank you... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #145890 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=145890\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I need to drain a pool. I know one pump can drain the pool in 8min and if I use a second pump I can drain the pool in 4min. The problem is the first pump is being used so I can only use the second pump. So I need to know how long it will take me to drain the pool using only the second pump?<BR>\n" );
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document.write( "Actually you can just look at this and see the answer is 8 min for the 2nd pump also,<BR>\n" );
document.write( "however, that will not always be the case, here is a method that will work for any shared work problem<BR>\n" );
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document.write( "Let t = time required for the 2nd pump to drain the pool by itself<BR>\n" );
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document.write( "Let the completed job = 1; (drained pool)<BR>\n" );
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document.write( "Write the equation for the two pumps working together.<BR>\n" );
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document.write( "Each pump does a fraction of the job, those two fraction must add up to 1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F8 ALIGN=MIDDLE  ALT=\"4%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Ft ALIGN=MIDDLE  ALT=\"4%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( "multiply the equation by 8t<BR>\n" );
document.write( "8t*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2F8 ALIGN=MIDDLE  ALT=\"4%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 8t*<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2Ft ALIGN=MIDDLE  ALT=\"4%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 8t(1)<BR>\n" );
document.write( "cancel out the denominators and you have:<BR>\n" );
document.write( "4t + 8(4) = 8t<BR>\n" );
document.write( "4t + 32 = 8t<BR>\n" );
document.write( "32 = 8t - 4t<BR>\n" );
document.write( "32 = 4t<BR>\n" );
document.write( "t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=32%2F4 ALIGN=MIDDLE  ALT=\"32%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 8 min, both pumps pump at the same rate. </SPAN>\n" );
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