A water tank decreases by 10 gallons every 3 hours every day. What is the total change in the amount of water in the tank after 6 days?

possible answers are.

80 gallons
-80 gallons
480 gallons
-480 gallons

1 answer

The tank decreases by 10 gallons every 3 hours. There are 24 hours in a day, so the tank decreases by (10/3) gallons every day.

After 6 days, the total change in the amount of water in the tank is 6 * (10/3) = 20 gallons.

Therefore, the correct answer is:
80 gallons.