SOLUTION: 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 ?

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 ?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let R1, R2, and R3 equal the rates in tankfuls/hr
that the pipes fill the tank
(1)
(2)
Subtracting (2) from (1), I see that ,
So P3 contributes nothing to filling the tank,
so it would never fill the tank. Are you sure you
copied this problem correctly?

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