The volume of a rectangular prism like that on the figure is given by the product of each of its dimentions (length, width and height):
![V=l\cdot w\cdot h](https://img.qammunity.org/2023/formulas/mathematics/college/3q2zwvs64f3ti00knxr5crf2fis1f7mjho.png)
Substitute l=5inches, w=4inches, and h=3inches:
![V=(5\text{inches})(4\text{ inches})(3\text{ inches})](https://img.qammunity.org/2023/formulas/mathematics/college/4kq224ju5lfh761n1g7a0xvpzvmgzpa1nz.png)
Multiply those numbers to find the value of the volume:
![V=60inches^3](https://img.qammunity.org/2023/formulas/mathematics/college/t5n56wlxvzp1vp1c0tqzhzux1zlj1e55w3.png)
Therefore, the volume of the light fixture is 60 cubic inches.