Mathematics, 29.10.2021 17:50, zafarm2oxgpmx

A very large tank initially contains 100L of pure water. Starting at time t=0 a solution with a salt concentration of 0.5kg/L is added at a rate of 6L/min. The solution is kept thoroughly mixed and is drained from the tank at a rate of 4L/min. How much kg of salt is in the tank after 30 minutes?

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