Answer: 2.5 hours, or 2 hours and 30 minutes.
Explanation:
To get this, we must divide 25 by 10. If 25 hours was spent over the course of 10 days, you would think of it as splitting up the hours over the 10 days. This can be accomplished through division. Assuming she watched an equal amount of TV each day, we would do 25/10. This is 2.5.