(Last Updated On: January 22, 2020)

#### Problem Statement:

A tank initially holds 100 gallons of salt solution in which 50 lbs of salt has been dissolved. A pipe fills the tank with brine at the rate of 3 gpm, containing 2 lbs of dissolved salt per gallon. Assuming that the mixture is kept uniform by stirring, a drain pipe draws out of the tank the mixture at 2 gpm. Find the amount of salt in the tank at the end of 30 minutes.

- A. 171.24 lbs
- B. 124.11 lbs
- C. 143.25 lbs
- D. 105.12 lbs

#### Problem Answer:

The amount of salt in the tank at the end of 30 minutes is **171.24 lbs**

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