Answer:
678.24 ft³
Explanation:
The larger cone has linear dimensions (radius and height) that are 3 times those of the smaller cone. (ratio = 6 ft/(2 ft) = 3)
The ratio of volumes is the cube of the ratio of linear dimensions, so the volume of the larger cone is ...
... V = (25.12 ft³)·(3³) = (25.12 × 27) ft³ = 678.24 ft³