A $200$ Gal tank is half full of distilled water.
A time $t=0$, a solution containing $0.5 ib/gal$ of concentrates enters the tank at the rate of $5 Gal/min$, and the well stirrec mixture is drawn with a route of $3Gal/min$.
A. At what time will the tank be full
B. At the time the tank is full, how many pound of conc will the well stirred solution be conc.