A tank originally contains 120 gal of fresh water. Then watercontaining 1/2 lb of salt per gallon is poured into the tank at arate of 2 gal/min, and the mixture is allowed to leave at the samerate. After 11 min the process is stopped, and fresh water ispoured into the tank at a rate of 2 gal/min, with the mixture againleaving at the same rate. Find the amount of salt Q(11) in the tankat the end of an additional 11 min.
Round your answer and intermediate answer to two decimalplaces.
Amount of salt in the tank at the end of an additional 11 min isQ(11)= _____ lbs.
