document.write( "Question 389193: Three pipes P1,P2,P3 fill a tank in 6 houres.If we closed P3, both pipes P1 AND P2 will fill the tank in 6 houres. how long does it take for P3 alone to fill the tank ? \n" ); document.write( "

Algebra.Com's Answer #275739 by josmiceli(19441) $\"\"$ $\"About$

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Let R1, R2, and R3 equal the rates in tankfuls/hr
\n" ); document.write( "that the pipes fill the tank
\n" ); document.write( "(1) $\"R%5B1%5D+%2B+R%5B2%5D+%2B+R%5B3%5D+=+1%2F6\"$
\n" ); document.write( "(2) $\"R%5B1%5D+%2B+R%5B2%5D+=+1%2F6\"$
\n" ); document.write( "Subtracting (2) from (1), I see that $\"R%5B3%5D+=+0\"$ ,
\n" ); document.write( "So P3 contributes nothing to filling the tank,
\n" ); document.write( "so it would never fill the tank. Are you sure you
\n" ); document.write( "copied this problem correctly?
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