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Homework Help: Can't get this problem

  1. Sep 10, 2004 #1
    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
     
  2. jcsd
  3. Sep 10, 2004 #2

    Tide

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    [tex]\frac {d}{dt} \frac {S^2 + W^2}{S+W} = \dot S[/tex]

    where W(t) is the amount of water in the tank and S is the amount of salt given by [itex]S = S_0 + \dot S \times t[/itex] with [itex]\dot S[/itex] being the constant rate at which salt is added.
     
  4. Sep 10, 2004 #3
    Are you sure about that tide? I could swear I tried that same thing, but I don't know, maybe I was just being an idiot. Thanks for the help
     
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