Question: ( 2 ) A tank initially contains 6 0 0 0 liters of brine with 1 kg of salt. Brine with a salt concentration of

(2) A tank initially contains 6000 liters of brine with 1 kg of salt. Brine with a salt concentration of 1.5 kg per liter flows into the tank at a rate of 60 liters per minute, and the well-mixed solution flows out at a rate of 30 liters per minute. How much salt is in the tank after half an hour?
( 2 ) A tank initially contains 6 0 0 0 liters of

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