document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=278501>Question 278501</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A swimming pool can be filled in 12 hours if water enters through a pipe alone, or in 28 hours if water enters through a hose alone. If the water is entering through both the pipe and the hose, how long will it take to fill this pool? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #202655 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=202655\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A swimming pool can be filled in 12 hours if water enters through a pipe alone,<BR>\n" );
document.write( " or in 28 hours if water enters through a hose alone.<BR>\n" );
document.write( " If the water is entering through both the pipe and the hose,<BR>\n" );
document.write( " how long will it take to fill this pool?<BR>\n" );
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document.write( "Let t = time required when both are used<BR>\n" );
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document.write( "Let the completed job (a full pool) = 1<BR>\n" );
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document.write( "A typical mixture equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F12 ALIGN=MIDDLE  ALT=\"t%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%2F28 ALIGN=MIDDLE  ALT=\"t%2F28\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 1<BR>\n" );
document.write( "Multiply equation by 84 to clear the denominators, results<BR>\n" );
document.write( "7t + 3t = 84<BR>\n" );
document.write( "t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=84%2F10 ALIGN=MIDDLE  ALT=\"84%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 8.4 hrs working together<BR>\n" );
document.write( ";<BR>\n" );
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document.write( "Check solution<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8.4%2F12 ALIGN=MIDDLE  ALT=\"8.4%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8.4%2F28 ALIGN=MIDDLE  ALT=\"8.4%2F28\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <BR>\n" );
document.write( ".7 + .3 = 1 </SPAN>\n" );
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