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The volume of air delivered by fan is 13 m^3/sec and 69 mm water gage. The density of air is 1.21 kg/m^3 and the

The volume of air delivered by fan is 13 m^3/sec and 69 mm water gage. The density of air is 1.21 kg/m^3 and the motor power needed to drive the fan is 52 kW. Determine the fan efficiency in % Answer in whole number

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