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A brine of solution of salt enters at a constant rate of 4 L/min into a...

A brine of solution of salt enters at a constant rate of 4 L/min into a large tank that initially held 100L of pure water. The solution inside the tank flows out of the tank at 3L/min. if the concentration of salt in the brine entering the tank is 0.2 kg/L, determine the mass of salt in the tank after t minutes.
When will the salt in the tank reach 0.1 kg/L?

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Answer #1

So

100+t=118.92

t=118.92-100=18.92 minutes

18.92 minutes

Amount of salt

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