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A tank initially contains 200 kg of salt in 1000 L of water. At exactly 10:00 am, pure water started to flow into the tank at a rate of 18 L/min. The well-mixed solution then leaves the tank at a rate of 20 L/min. When the amount the salt in the tank reaches 50% of the original, the incoming rate was increased by 4 L/min. At what time was the incoming rate increased? 10:11 am 10:22 am 10:33 am 10:44 am

A tank initially contains 200 kg of salt in 1000 L of water. At exactly 10:00 am, pure water started to flow into the tank at a rate of 18 L/min. The well-mixed solution then leaves the tank at a rate of 20 L/min. When the amount the salt in the tank reaches 50% of the original, the incoming rate was increased by 4 L/min. At what time was the incoming rate increased? 10:11 am 10:22 am 10:33 am 10:44 am

Advanced Engineering Mathematics
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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A tank initially contains 200 kg of salt in 1000 L of water. At exactly 10:00 am, pure water started to flow into the tank at a rate of 18 L/min. The well-mixed solution then leaves the tank at a rate of 20 L/min. When the amount the salt in the tank reaches 50% of the original, the incoming rate was increased by 4 L/min. At what time was the incoming rate increased? 10:11 am 10:22 am 10:33 am 10:44 am What is the volume inside the tank when the amount of salt reaches 25% of the original? O 10002 1100 L 1200 L 1300 L
Transcribed Image Text:A tank initially contains 200 kg of salt in 1000 L of water. At exactly 10:00 am, pure water started to flow into the tank at a rate of 18 L/min. The well-mixed solution then leaves the tank at a rate of 20 L/min. When the amount the salt in the tank reaches 50% of the original, the incoming rate was increased by 4 L/min. At what time was the incoming rate increased? 10:11 am 10:22 am 10:33 am 10:44 am What is the volume inside the tank when the amount of salt reaches 25% of the original? O 10002 1100 L 1200 L 1300 L
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