An air blower is to deliver 40,000 ft^3/min. Two U-tube gages measure suction and discharge pressures. The suction gauge reads a negative 2′′ of water. The discharge gage, located 3 ft above the point to which the suction gauge is attached, reads +3′′ of water. The discharge and suction ducts are of equal diameter. What size motor should be used to drive the blower if the overall efficiency is 68% (γ = 0.0750 lb/ft^3 for air)?

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