A 1.4 cubic meter container is filled with pressurized air at 20 degrees Celsius. At time t=0 air escapes out of a small 0.1 cm^2 tube in the side of the tank. The velocity out of the tube may be approximated by V = √(2(p-patm)/ρ), where p is the absolute tank pressure. Determine the time at which the pressure (gage) in the tank is 20 kPa if the initial pressure is 40 kPa (gage). Assume the air temperature remains at 20 degrees celcius throughout.