document.write( "Question 669609: It takes 8 hours to fill a pool with the inlet pipe. It can be emptied in 12 hours with the outlet pipe. If the pool is 1/2 full to begin with, how long will it take to fill it from there if both pipes are open? \n" ); document.write( "

Algebra.Com's Answer #416595 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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It takes 8 hours to fill a pool with the inlet pipe.
\n" ); document.write( " It can be emptied in 12 hours with the outlet pipe.
\n" ); document.write( " If the pool is 1/2 full to begin with, how long will it take to fill it from there if both pipes are open?
\n" ); document.write( ":
\n" ); document.write( "let t = time when both valves are left open
\n" ); document.write( ":
\n" ); document.write( "let the completed job = 1 (full pool)
\n" ); document.write( ":
\n" ); document.write( " $\"t%2F8\"$ - $\"t%2F12\"$ = $\"1%2F2\"$
\n" ); document.write( "multiply by 24, resulting in
\n" ); document.write( "3t - 2t = 12
\n" ); document.write( "t = 12 hrs to complete filling the pool
\n" ); document.write( " \n" ); document.write( "

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