Question 9 N'S REMAINING 5 Points A tank initially holds 200 gal of brine solution containing 3 lb of salt. At t=0, another brine solution containing 3 lb of salt per gallon is poured into the tank at the rate of 6 gal / min, while the well stirred mixture leaves the tank at the same rate. Find the time at which the mixture in the tank contains 6 lb of salt. 0.216 min B 0.168 min C 0.325 min D 0.762 Question 10 5 Points Refer to the problem in question 9, Find the time at which the mixture in the tank contains 10 lb of salt. A 0.39 min B 0.49 min C 0.59 min D 0.69 min