Final answer:
c. 64 cubic inches. The volume of the similar solid with a side length of 4 inches is 64 cubic inches.
Step-by-step explanation:
The volume of a similar solid is determined by the ratio of the corresponding sides raised to the power of three. In this case, the side length of the similar solid is 4 inches. Therefore, the volume of the similar solid can be calculated by raising 4 to the power of three, which is 4^3 = 64 cubic inches. So, the answer is option c. 64 cubic inches.