A 200-Gallon Tank Is Full of a Solution Containing 25

question 71

Multiple Choice

A 200-gallon tank is full of a solution containing 25 pounds of concentrate. Starting at time distilled water is added to the tank at a rate of 20 gallons per minute, and the well-stirred solution is withdrawn at the same rate. Find the time at which the amount of concentrate in the tank reaches 15 pounds. Round your answer to one decimal place.

• A) 2.2 min
• B) 1.8 min
• C) 10.2 min
• D) 5.1 min
• E) 10.2 min.

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