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A hospital ventilator is fed by an oxygen supply at a density of 1.07 kg/m³ flowing with a mean velocity 22.8cm/s through a pipe of circular cross-section with diameter 18.4mm. The oxygen is mixed with ambient air, density of 1kg/m³, at a rate of 15.9 litres per minute. the gas mixture is humidified by the addition of 14.5 cubic centimeters of water per hour, 1000kg/m³. The final density of the gas emerging from the ventilator 1.11kg/m³. Calculate the total volume flow of gas supplied from the ventilator in liters per minute to 4 significant figures.
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