1. The problem statement, all variables and given/known data A tank containing 400 liters of water has 10 kg of salt solute (dissolved salt). Some brine containing 0.03kg/L of salt is then introduced at a rate of 2 L/min. The solution is constantly mixed and evacuated at a rate of 2L/min, such that the volume remains constant. If Q(t) is deﬁned as the quantity of salt (in kg) dissolved in the tank after time t (in minutes), How do you find the differential equation? 2. Relevant equations dQ/dt = Rin-Rout 3. The attempt at a solution I have no idea how to find Rin or Rout, what do you need in their equations?