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52cm
68cm
88cm
104cm

So you would need to find the volume of both the smaller box and larger box. To find the volume of a rectangular prism you multiply the length x height x width.

Smaller rectangular prism:
4 x 2 x 4 = 32

Larger rectangular prism:
6 x 6 x 2 = 72

Then add them together so 32 + 72 = 104
104cm^3

Hope this helps! :)

Ithink the answer is c just trying to others