newly! II I IUI ll 1. Atank initially contains 400 L of brine in which 25 kg of salt are dissolved. A pipe lls the tank with brine at the rate of 12Umin containing 0.2 kg of dissolved salt per L. The mixture, kept well- stirred, runs out at the rate of 8 Umin. Determine the amount of salt at the end of 30 minutes. Ans. 71.46 kg 2. A tank contains 2000 L of brine. Brine containing SNIL of salt flows in at 10Umin. and the mixture . kept uniform by stirring. ows out at the rate of 20lein. If the concentration of salt is BNIL at the end of 1 hour, how much was the concentration of the salt at the beginning? Ans. 9.29 NIL 3. Atank initially holds 100 gal of salt solution in which 50 lb of salt has been dissolved. A pipe lls the tank with brine at the rate of 3 gprn. containing 2 lb of dissolved salt per gzllon Assgmlng