consider a tang used in certain hydrodynamic experiments. after one experiment the tank contains 200 L of a dye solution with a concentration of 1 g/L. to prepare for the next experiment, the tank is to be rinsed with fresh water flowing in at a rate of 2 L/min, the well-stirred solution flowing out at the same rate. find the time that will elapse before the concentration of dye in the tank reaches 1% of its original value.