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Blood in an isolated organ perfusion system flows out of the bottom of a vertical holding tank with cross-sectional area A. The flow rate

Blood in an isolated organ perfusion system flows out of the bottom of a vertical holding tank with cross-sectional area A. The flow rate is proportional to the height of fluid in the tank, with a constant relation a (area/time). How long will it take for half of the fluid to leave the tank? Ac ho a Qv.out

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