A room measures 20 m by 55 m by 50 m the heating and, Ask an Expert

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A room measures 2.0 m by 5.5 m by 5.0 m. The heating and air-conditioning ducts to and from the room are circular with diameter 0.23 m and all the air in the room is to be exchanged every 18 min.

(a) What is the average flow rate?

m3/s

(b) What is the necessary flow speed in the duct? (Assume that the density of the air is constant.)

m/s

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