Tap P and Q fill at the rate of 12 liter and 10 liter per minute, respectively.
Taking statement 1, Pipe R drains out at the rate of 6 liters per minutes (This statement is alone not sufficient to determine the capacity of the tank)
Now taking both statements 1 and 2
If both the taps and the drain pipe are opened simultaneously then in 1 minute (12 + 10 – 6), i.e., 16 liters of water will be filled.
∴ Net capacity = 16 × (5 × 60 + 45) = 5520
Now taking statements 2 and 3
Tap P and Q fill the part of tank in 1 hr
=−Tap P and Q fill the tank in
=hr
Capacity will be
=×22Thus, we can see that any two out of S1, S2 and S3 are sufficient to determine the capacity of tank.