A 30-gallon tank initially contains 15 gallons of salt water containing 6 pounds of salt. Suppose salt water containing 1 pound of salt per gallon is pumped into the top of the tank at the rate of 2 gallons per minute, while a well-mixed solution leaves the bottom of the tank at a rate of 1 gallon per minute. How much salt is in the tank when the tank is full? Enter the exact numerical answer as a decimal. Do not enter a calculation.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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A 30-gallon tank initially contains 15 gallons of salt water containing 6 pounds of salt. Suppose salt water
containing 1 pound of salt per gallon is pumped into the top of the tank at the rate of 2 gallons per minute,
while a well-mixed solution leaves the bottom of the tank at a rate of 1 gallon per minute. How much salt is in
the tank when the tank is full?
Enter the exact numerical answer as a decimal. Do not enter a calculation.
Transcribed Image Text:A 30-gallon tank initially contains 15 gallons of salt water containing 6 pounds of salt. Suppose salt water containing 1 pound of salt per gallon is pumped into the top of the tank at the rate of 2 gallons per minute, while a well-mixed solution leaves the bottom of the tank at a rate of 1 gallon per minute. How much salt is in the tank when the tank is full? Enter the exact numerical answer as a decimal. Do not enter a calculation.
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