A storage tank is connected to a pond (at atmospheric pressure!) by a length of 3-in pipe and two gate valves. From previous operating experience, it has been found that when the tank is at a pressure of \(3 \mathrm{~atm}\), the flow through the pipe is \(12.5 \mathrm{~m}^{3} / \mathrm{h}\), when both gate valves are fully open. If the pressure in the tank increases to \(5 \mathrm{~atm}\), what will be the maximum discharge rate from the tank?