Answer:
[tex]25[/tex]
Explanation:
Here, we want to know the number of hours for which the water level is increasing
We can get this from the given plot
We had an increase, then it became constant, followed by a decrease and then being constant again
There was an increase from 0 to 3000 gallons within 25 hours
Thus, we can say the water level increased for 25 hours
