|Pipes A and B fill a tank in 30 minutes and 15 minutes. Pipe C drains 12 liters of water in a minute. If all of them are kept open when the tank is full, the tank empties in 30 minutes. How much water the tank can hold?
Trick/ Formula: Full tank + Input = Output
Let X be the capacity of the tank.
X + Input in 30 minutes = Output in 30 minutes
X + 30 *( x/30 + x/15) = 30*12
4x=360; x = 90 ltr
In 1 minute, pipe A can fill 1/30th & B can fill 1/15th of the tank’s capacity.
Capacity of pipe A = 1/30
Capacity of B = 1/15