6. Another Example (Mixing) [+] NOTE: The template notes contain a worked out example of a mixture problem pertaining to air flowing. into a room. A tank contains 70 kg of salt and 1000 L of water. A solution of a concentration 0.035 kg of salt per liter enters a tank at the rate 9 L/min. The solution is mixed and drains from the tank at the same rate. (a) What is the concentration of our solution in the tank initially? concentration = (kg/L) (b) Find the amount of salt in the tank after 2 hours. amount = (kg) (c) Find the concentration of salt in the solution in the tank as time approaches infinity. concentration = (kg/L) Question Help: Video Message instructor Post to forum Submit Question