(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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

2. Relevant equations

3. 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

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Mixing Tank, Differential Equations Problem

**Physics Forums | Science Articles, Homework Help, Discussion**