(1 point) Suppose that a tank holds 1000 liters of water, and 3 kg of salt is poured into the tank. Compute the concentration of salt in grams per liter. Concentration is 555 g/L. Assume now that you want to reduce the salt concentration. One method would be to remove a certain amount of salt water from the tank and then replace it by pure water. How much salt water do you have to replace by pure water to obtain a salt concentration of 2 grams per liter? You must replace 555 liters. Another method for reducing the salt concentration would be to hook up an overflow pipe and pump pure water into the tank. That way, the salt concentration would be gradually reduced. Assume that you have a pump that pumps water at a rate of 1 liter per second. How would it take to reduce the salt concentration from the original concentration to 2 g/L and how much pure water would be needed? (Note that the rate at which water enters the tank is equal to the rate at which water leaves the tank.) It would take i5! seconds and would require EEE liters of water. Now suppose your pump instead pumps at a rate of 6 liters per second. With this faster pump, how long would it take to reduce the salt concentration from the original concentration to 2 g/L and how much pure water would be needed? liters of water. It would take 5!! seconds and would require