Example 1: A large tank holds 350 gallons of brine solution with 38 lbs. of salt. A concentration of 2lbs./gal is pumped in at a rate of 4 gal/min. The concentration leaving the tank is pumped out at a rateof 3 gal/min. How much salt is in the tank after 15 min?

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Answered: Example 1: A large tank holds 350…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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2. A.tank initially contains 100 gal of a solution that holds 25 lb of a chemical. Water runs into the tank at the rate of 3 gal/min and the solution runs out at the same rate. How much of the chemical remains in the tank after of the chemical in to reduce the amount 15 min? How long does it take the tank to 1 lb?
1. A tank contains 100 gallons of brine made by dissolving 60 pounds of salt in water. Salt water containing 1 pound of salt per gallon runs in at the rate of 2 gal/min, and the mixture, kept unifom by stirring runs out at the rate of 3 gal/min. Find the amount of salt in the tank at the end of 1 hour.
6
A doctor asks a nurse to give a patient 150 milligrams (mg) of the drug simethicone. The drug is available only in a solution whose concentration is 24 mg simethicone per 0.6 milliliter (ml) of solution. How many milliliters of solution should the nurse give the patient?
Drinking water is treated with fluoride before it is made available to the public. The ideal level is 0.7 ppm. A 20,000 gallon mixing tank is half full and contains 2 lb of fluoride. Fresh water enters from the lake at 2 gallons per minute. If the tank is dis- charged at 1 gallon per minute, how many pounds of fluoride is in the tank the moment it is full? Is it safe to drink using the conversion 1 lb/gal (US) = 119826 ppm?

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Example 1: A large tank holds 350 gallons of brine solution with 38 lbs. of salt. A concentration of 2 lbs./gal is pumped in at a rate of 4 gal/min. The concentration leaving the tank is pumped out at a rat of 3 gal/min. How much salt is in the tank after 15 min?