The dolphin tank is similar to a cylinder. To find the volume of a cylinder, you use the formula:πr²h=V For pi, we are using 3.14 and the height is 20 while the radius is 75. 3.14×75²×20 3.14×5,626×20 17,662.5×20=353,250 The volume is 353,250.0 ft³, which is the fourth answer.
