average speed of air in the 450 × 350 duct? ume flow rate in m³/s and mm³/hour. What is the rate of air in the 450 × 350 duct? Express the vol- 200 X 250 ducts is 10 m/s. What is the volume low duct. The average speed of the air in each of the 8.25. Consider the duct system shown in the accompany- ing figure. Air flows through two 200 mm-by-250 mm ducts that merge into a 150 mm by 350 mm average speed of air in the 450 × 350 ducr? 200 mm x 250 mm 10 m/s 450 mm X 350 mm 10 m/s 200 mm x 250 mm Problem 8.25

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