- #1
bdh2991
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Homework Statement
a larg tank is filled with 500 gals of water with 400lbs of salt. pure water is pumped into the tank at a rate of 3gal/min. the well mixed solution is pumped out at a rate of 7 gal/min.
I need help finding the Differential
Homework Equations
The Attempt at a Solution
I tried coming up with the D.E. and this is what i got dA/dt = 3 - 7A/(500-t)
except after i did solved the d.e. i kept getting more salt than i started with which makes no sense...
Please Help lol