Geometry

Question Analysis:
This real-world problem models a rectangular prism with one face (top) missing.
The main focus is subtracting one rectangle from the total surface area.

Key Concept Explanation:
Total surface area of a closed rectangular prism:
= 2lw + 2lh + 2wh
If the top is open: subtract lw (top area)

Step-by-Step Solution:
Add back only one bottom face:
Bottom = 4 × 3 = 12
Side walls = 2(4×2) + 2(3×2) = 16 + 12 = 28
Total = 12 (bottom)...