The gauge on a water tank shows that the tank is 1/3 full of water. To fill the tank, 16 gallons of water are added. How many gallons of water does the tank hold when full? Let's think first. Chain of thought:
Given that the tank is 1 / 3 full of water, and that it requires 16 gallons to fill. 1 full tank - 1 / 3 tank = 2 / 3 of the tank is empty, which is equal to 16 gallons. If 2 / 3 of the tank equals 16 gallons, this means 1 / 3 of the tank is equal to 16 / 2 gallons = 8 gallons. The total capacity of the tank or how much the tanks holds = 16 + 8 = 24 gallons.
Therefore, the answer is 24.