How many minutes are there in one day?

In one day, there are 24 hours. To determine the total number of minutes in a day, you multiply the number of hours by the number of minutes in one hour (60 minutes).

So, the calculation is:

24 hours/day × 60 minutes/hour = 1440 minutes/day.

This clearly shows that there are 1440 minutes in one day, which makes this the correct answer. Understanding this calculation is crucial in various aspects of water operations, such as scheduling maintenance, monitoring usage, or planning treatments, where time management is essential.