A tank contains 360 liters of fluid in which 20 grams of salt is dissolved. Pure water is then pumped into the tank at a rate of
6(L)/(m)in
; the well-mixed solution is pumped out at the same rate. Let the
A(t)
be the number of grams of salt in the tank at time
t
. Find the rate at which the number of grams of salt in the tank is changing at time
t
.
(dA)/(dt)=
Find the number
A(t)
of grams of salt in the tank at time
t
.
A(t)=