A leak in the bottom of the tank can empty the full tank in 6 hours. An inlet pipe fills at the rate of 4 L per minute. When the tank is full, the inlet is opened and ue to the leak the tank is emptied in 8 hours. Find the capacity of the tank.
Answer: Option C
Leak in the tank can empty the full tank in 6 hours
Inlet can fill the tank at the rate of 4 liters per minute
Work done by inlet in 1 hour
Work done by inlet in 1 min
Volume of parts of the tank is 4 liters
Upon cross multiplication,
Total capacity of the tank is 1440 x 4=5760 liters
A tank has three pipes A, B and C. Pipe A and B can fill the tank in 3 and 4h respectively. While pipe C can empty the completely filled tank in 1 hour. If all the pipes are opened in order at 3 pm, 4 pm and 5 pm respectively at what time the cistern will be empty?