Problem 20

Given information

We are given that,

A tank contains of pure water.

Brine that contains  kg of salt per liter enters the tank at a rate of  

We have to calculate how much salt is there in the tank after minutes.

Step-by-step explanation

Let us consider that denotes the amount of salt in the tank in . The concentration at time min is then .

Now, 

The rate of salt into the tank  

The rate of salt out of the tank