# Can't get this problem

set up a differential equation to represent 2 tons of salt entering a 20 ton tank of water each minute while 2 tons of the mixture are drained each minute

Related Introductory Physics Homework Help News on Phys.org
Tide
$$\frac {d}{dt} \frac {S^2 + W^2}{S+W} = \dot S$$
where W(t) is the amount of water in the tank and S is the amount of salt given by $S = S_0 + \dot S \times t$ with $\dot S$ being the constant rate at which salt is added.