Question

Milt built a prism using a 3 unit cubes. He adds two more layers of 3 unit cubes each.how many unit cubes are used for the prism?

Answer 1

We know that
1) Milt built a prism using a 3 unit cubes
total unit cubes is 3

2) He adds two more layers of 3 unit cubes each
total unit cubes=3+2*3----> 9 unit cubes

the answer is
9 units cubes