Respuesta :

The volume changed because the volume used to be 27 cubic inches, but now it is 33 cubic inches since he added the 6 cubes.
I hope this helps : )

Step-by-step explanation:

Assuming the length of each cube's sides is s, then the volume of each cube is V = s³.  The number of cubes before adding is 2×3×3 = 18.  So the total volume is:

V = 18s³

After adding 6 cubes, the volume becomes:

V = 18s³ + 6s³

V = 24s³

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