Question

A rectangular prism has a length of 4 in., a width of 5 in., and a height of 3 1/2in.

The prism is filled with cubes that have edge lengths of 1/2 in.


How many cubes are needed to fill the rectangular prism?

Answer 1

Explanation:

it needs 4×2 = 8 cubes asking the length, 5×2 = 10 cubes along the width, and 3 1/2 × 2 = 7 cubes along the height.

so, altogether

8×10×7 = 560 cubes