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**tank**contains 10 kilograms of

**salt**dissolved in 60 liters of water. Solution of water and

**salt**(brine) with concentration of 0.1 kilograms per liter is flowing in at the rate of 5 liters a minute. The solution in the

**tank**is well stirred and flows out at a rate of 3 liters a minute. How much

**salt**is in the

**tank**when the

**tank**is full?.