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A tank contains 80 grams of salt dissolved in 500 L of water. The inflow per minute is 20 g of salt dissolved in 20L of water. The outflow is 20 L/min of the uniform mixture. 4. Which of the following equations relates the mass of salt m (in grams) in the tank and the time t (in minutes)? dm А. dt = 20 25 dm + 20m = 20 dt dm С. dt = 1 25 dm D. dt + 20m = 1 5. Find the time (in minutes) at which the salt content of the tank will reach 475 grams. a. 82.41 b. 53.82 C. 61.95 d. 70.53 B.

A tank contains 80 grams of salt dissolved in 500 L of water. The inflow per minute is 20 g of salt dissolved in 20L of water. The outflow is 20 L/min of the uniform mixture. 4. Which of the following equations relates the mass of salt m (in grams) in the tank and the time t (in minutes)? dm А. dt = 20 25 dm + 20m = 20 dt dm С. dt = 1 25 dm D. dt + 20m = 1 5. Find the time (in minutes) at which the salt content of the tank will reach 475 grams. a. 82.41 b. 53.82 C. 61.95 d. 70.53 B.

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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Hi! I badly need answers to these two questions (4 and 5). It woul be really appreciated if I received the answer in at most 30 minutes. Thank you in advance!

A tank contains 80 grams of salt dissolved in 500 L of water. The inflow per minute is 20 g of salt dissolved in 20 L of water. The outflow is 20 L/min of the uniform mixture. 4. Which of the following equations relates the mass of salt m (in grams) in the tank and the time t (in minutes)? dm А. dt m + = 20 25 dm + 20m = 20 dt dm С. dt m =1 25 dm dt + 20m = 1 D. 5. Find the time (in minutes) at which the salt content of the tank will reach 475 grams. а. 82.41 b. 53.82 c. 61.95 d. 70.53 B.
Transcribed Image Text:A tank contains 80 grams of salt dissolved in 500 L of water. The inflow per minute is 20 g of salt dissolved in 20 L of water. The outflow is 20 L/min of the uniform mixture. 4. Which of the following equations relates the mass of salt m (in grams) in the tank and the time t (in minutes)? dm А. dt m + = 20 25 dm + 20m = 20 dt dm С. dt m =1 25 dm dt + 20m = 1 D. 5. Find the time (in minutes) at which the salt content of the tank will reach 475 grams. а. 82.41 b. 53.82 c. 61.95 d. 70.53 B.
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