Answer:
The water level dropped 0.0227 inches each hour.
Explanation:
This question can be solved using a rule of three.
Between 10 pm and 7:10 am the water level in a swimming pool decreased by 5/24 inches.
Between 10 pm and 7:10 am, there are 12 - 10 = 2 + 7 - 0 = 9 hours and 10 - 0 = 10 minutes.
So 9*60 + 10 = 550 minutes.
In 550 minutes, the water level decreased by 5/24 = 0.2083 inches. How much did it decrease per 60 minutes?
60 minutes - x inches
550 minutes - 0.2083 inches
550x = 60*0.2083
x = 60*0.2083/550
x = 0.0227
The water level dropped 0.0227 inches each hour.