A box in the shape of a rectangular prism, with dimensions 12 inches by 18 inches by 12 inches, can hold exactly 12 cubes measuring 6 inches on each side. If the length and width of the base are doubled, how many cubes could the new box hold?

Doubling both base dimensions multiplies the box’s volume by 2 × 2 = 4, while its height stays the same. The original box holds 12 cubes, so the new box holds 12 × 4 = 48 cubes. The correct choice is 48.

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