A cubical tank is filled with water to a level of 2 feet. If the water

A cubical tank is filled with water to a level of 2 feet. If the water in the tank occupies 18 cubic feet, to what fraction of its capacity is the tank filled with water? A. 1/9 B. 2/9 C. 1/3 D. 1/2 E. 2/3