initially a large tank with a capacity of 300 gallons contains150 gallons of clean water. A solution of salt with a concentrationof 2 lb / gal flows into the tank at a rate of 50 gal / min. Thesolution is perfectly well mixed while the solution is extracted ata rate of 25 gal / min. Find:
a) the amount of salt in the tank at the time it is filled (inpounds)
b) the speed at which salt is coming out at this time (in poundsper minute)
c) The amount of salt that has left the tank since the beginningand until that moment (in pounds)
