Suppose that we have a system consisting of two interconnected tanks. each containing a brine soltllion. Tank A contains _f(l) pounds of salt in 200 gallons of brine. and tank B contains y(l) pounds of salt in 300 gallons of brine. The mixture in each tank is kept unifonn by constant stirring. When I = O. brine is pumped from tank A to tank B at 20 gallons/minute and from tank B to tank A at 20 gallons/minute. Find the amount of salt in each t:lOk at time I if _f(O) = 10 and y eO) = 40. 20 g::.llonslminute 20 gallonslminute TankA Tank B

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