Question

Ethan has partially filled the prism with 8 unit cubes.

How many more cubes does he need to fill the prism completely?
10
O 15
O 19
O 21

Answer 1

I would say 19, maybe.

Explanation:

Answer 2

See below

Explanation:

You can calculate it only when the dimensions of the prism are given.

Here, in this case dimensions of the prism are mentioned. So, number of required cubes can not be determined.