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A tank contains 100 gal of water. Brine enters the tank at the rate of 3 gal/min....

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Basic Math

Atank contains 100 gal of water. Brine enters the tank at the rateof 3 gal/min. The mixture, thoroughly stirred, leaves the tank atthe rate of 2 gal/min. If the salt concentration in the brine atthe end of 20 minutes is to be 2 lb/gal, what should be the saltconcentration in the brine entering the tank?

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