A container that has 5 L of water with 1 kg salt dissolved is to be filled by pure water at a rate of 0.5 L/min. The mixture is kept homogeneous by stirring and the solution is being pumped out at twice the rate of input. Find the function of salt in the container at any given time. OS (1) = 0.1(100 - 1)² kg S (t) = 0.01(10-1)² kg

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