Solution:
1. Formula for the volume of a rectangular box:
- The volume V is calculated as length \times width \times height.
2. Given measurements:
- Length = 15 inches
- Width = 8 inches
- Height = 4 inches
3. Calculate the volume:
- Volume V = 15 \times 8 \times 4
- Volume V = 120 \times 4
- Volume V = 480 cubic inches