4. A large tank contains 100 gal of brine in which initially 50 lbs of salt are dissolved. Brine containing 1 lb of salt per gallon then flows into the tank at the rate of 3 gallon/minute while the mixture runs out of the tank at the rate of 2 gallons/minute. After 25 minutes, how much salt is in the tank?
4. A large tank contains 100 gal of brine in which initially 50 lbs of salt are dissolved. Brine containing 1 lb of salt per gallon then flows into the tank at the rate of 3 gallon/minute while the mixture runs out of the tank at the rate of 2 gallons/minute. After 25 minutes, how much salt is in the tank?
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Transcribed Image Text:4. A large tank contains 100 gal of brine in which initially 50 lbs of salt are dissolved.
Brine containing 1 lb of salt per gallon then flows into the tank at the rate of 3
gallon/minute while the mixture runs out of the tank at the rate of 2
gallons/minute. After 25 minutes, how much salt is in the tank?
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