A water tank decreases by 10 gallons every three hours every day. What is the total change in the amount of water in the tank after six days

1 answer

After 1 day, the water tank decreases by 10 gallons every 3 hours, which means that after 24 hours (1 day * 24 hours/day), the water tank decreases by (24 hours / 3 hours) * 10 gallons/hour = <<24/3*10=80>>80 gallons.
After 6 days, the total change in the amount of water in the tank is 6 days * 80 gallons/day = <<6*80=480>>480 gallons. Answer: \boxed{480}.