The question above is basically asking for the volume of the water balloon with the diameter 6 inches. The radius is equal to 3 inches. The volume of the sphere is, V = 4πr³/3. Substituting the value of radius, V = 4π x (2 in)³ /3 = 33.51 in³. Thus, the amount of water in the balloons is approximately 33.51 in³.