A large tank is partially filled with 150 gallons of pure water. Brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 5 gal/min. The well-mixed solu- tion is pumped out of the tank at the rate of 4 gal/min. Find the number of pounds of salt in the tank after 30 minutes.

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter12: Quadratic Functions
Section12.6: Solving Problems Involving Quadratic Equations
Problem 1.5E
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A large tank is partially filled with 150 gallons of pure water. Brine containing 2 pounds
of salt per gallon is pumped into the tank at a rate of 5 gal/min. The well-mixed solu-
tion is pumped out of the tank at the rate of 4 gal/min.
Find the number of pounds of salt in the tank after 30 minutes.
Transcribed Image Text:A large tank is partially filled with 150 gallons of pure water. Brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 5 gal/min. The well-mixed solu- tion is pumped out of the tank at the rate of 4 gal/min. Find the number of pounds of salt in the tank after 30 minutes.
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