A tank has 3 outlet pipes whose efficiencies are same. All pipes are at same intervals of height, if first tap is at base of tank and 3^rd top is at 2 / 3 of height. If pipe 1 can empty the tank in 12 hours and all pipes are opened simultaneously then _______ the time taken to empty the tank and if the equal time is taken by inlet pipe A which can pour 300 gallons of water per hour in tank then the _______ capacity of tank.