Answer:
12,680 gallons at the end of the day
Explanation:
The valve that releases water into the cleaning tank is 20 gallons per hour. The hose that is running water into the pool is 60 gallons per hour.
60 gallons x 3 hours = 60 gallons from the hose.
20 gallons x 6 hours = 120 gallons from the valve.
60 + 120 gallons = 180 gallons.
12,500 = how much was at the start of the day
180 = how much was added
180 + 12,500 = 12,680
this should be correct! i hope this helps you!