document.write( "Question 310430: a filler pipe can fill a tank in 10 hours, while an outlet pipe can empty the tank in 15 hours. how long will it take to fill the empty tank with both pipes operating \n" ); document.write( "

Algebra.Com's Answer #222175 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
a filler pipe can fill a tank in 10 hours, while an outlet pipe can empty the
\n" ); document.write( " tank in 15 hours. how long will it take to fill the empty tank with both pipes operating
\n" ); document.write( ":
\n" ); document.write( "Let t = time required when both pipes are on
\n" ); document.write( ":
\n" ); document.write( "Let the completed job = 1 (a full tank)
\n" ); document.write( ":
\n" ); document.write( "Fill is +, drain is -
\n" ); document.write( ":
\n" ); document.write( " $\"t%2F10\"$ - $\"t%2F15\"$ = 1
\n" ); document.write( "Multiply eq by 30,
\n" ); document.write( "30* $\"t%2F10\"$ - 30* $\"t%2F15\"$ = 30(1)
\n" ); document.write( " results
\n" ); document.write( "3t - 2t = 30
\n" ); document.write( "t = 30 hrs to fill with both pipes on \n" ); document.write( "

\n" );