First, find out how many liters are yet to be filled:

52,000-13,000=39,000

To find out how much time is left, divide the amount yet to be filled by the rate, which is given:

39,000/90 \(\displaystyle\approx\) 433.33 minutes

Convert to hours by dividing by 60:

433.33/60=7,22 hours

It will take 7,22 hours for the water tower to get filled.

52,000-13,000=39,000

To find out how much time is left, divide the amount yet to be filled by the rate, which is given:

39,000/90 \(\displaystyle\approx\) 433.33 minutes

Convert to hours by dividing by 60:

433.33/60=7,22 hours

It will take 7,22 hours for the water tower to get filled.