----A room has a volume of 121m^3. An air-conditioning system is to replace the air in this room every thirty minutes, using ducts that have a square cross section. Assuming that air can be treated as an incompressible fluid, find the length of a side of the square if the air speed within the ducts is 2.86m/s.----(adsbygoogle = window.adsbygoogle || []).push({});

Um...I'm lost on this one. Not sure where to start...any help would be much appreciated. :)

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# Homework Help: Air conditioning

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