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Problem: A tank contains 20 kg of salt dissolved in 5000 L of water. Brine that contains 0.03 kg of salt per liter of water enters the tank at a rate of 25 L/min. The solution is kept thoroughly mixed. If the rate of outflow is 30 L/min, what is the amount of salt dissolved in the well-mixed solution at t minutes? (A) There is no correct answer from the given options. B Q(t) = m(1000- t). (C) Q(t) = -—— (1000-t) — - Ⓒ 18 1017 ℗ Q(t) = -—- (1000-1). (E 180 10006 In(1000-t) 6 Q(t) = (1000-t) - 20( 1000 – ¿) 6 180 10006 (1000– t) 6 (1000-t) 6

Problem: A tank contains 20 kg of salt dissolved in 5000 L of water. Brine that contains 0.03 kg of salt per liter of water enters the tank at a rate of 25 L/min. The solution is kept thoroughly mixed. If the rate of outflow is 30 L/min, what is the amount of salt dissolved in the well-mixed solution at t minutes? (A) There is no correct answer from the given options. B Q(t) = m(1000- t). (C) Q(t) = -—— (1000-t) — - Ⓒ 18 1017 ℗ Q(t) = -—- (1000-1). (E 180 10006 In(1000-t) 6 Q(t) = (1000-t) - 20( 1000 – ¿) 6 180 10006 (1000– t) 6 (1000-t) 6

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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Problem: A tank contains 20 kg of salt dissolved in 5000 L of water. Brine that contains 0.03 kg of salt per liter of water enters the tank at a rate of 25 L/min. The solution is kept thoroughly mixed. If the rate of outflow is 30 L/min, what is the amount of salt dissolved in the well-mixed solution at t minutes? (A) There is no correct answer from the given options. B Q(t) = m(1000- t). (C) Q(t) = -—— (1000-t) — - Ⓒ 18 1017 ℗ Q(t) = -—- (1000-1). (E 180 10006 In(1000-t) 6 Q(t) = (1000-t) - 20( 1000 – ¿) 6 180 10006 (1000– t) 6 (1000-t) 6
Transcribed Image Text:Problem: A tank contains 20 kg of salt dissolved in 5000 L of water. Brine that contains 0.03 kg of salt per liter of water enters the tank at a rate of 25 L/min. The solution is kept thoroughly mixed. If the rate of outflow is 30 L/min, what is the amount of salt dissolved in the well-mixed solution at t minutes? (A) There is no correct answer from the given options. B Q(t) = m(1000- t). (C) Q(t) = -—— (1000-t) — - Ⓒ 18 1017 ℗ Q(t) = -—- (1000-1). (E 180 10006 In(1000-t) 6 Q(t) = (1000-t) - 20( 1000 – ¿) 6 180 10006 (1000– t) 6 (1000-t) 6
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