What is the area of a circular cardboard piece needed for the base of a model of a volcano that is 20 centimeters tall and has a volume of 960 cubic centimeters? Which equation represents this real-world problem? V = one-third (960) (20) 20 = one-third 960 (h) 960 = one-third pi 10 squared h 960 = one-third B (20)