A rectangular box is 8 decimeters long, 5 decimeters wide, and 3 decimeters high. What is its total surface area?
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- The box has two faces of sizes 8 × 5, 8 × 3, and 5 × 3.
- Calculate 2 × (8 × 5 + 8 × 3 + 5 × 3).
Show the answer and solution
Answer: 158
There are two faces of each size. The area is 2 × (8 × 5 + 8 × 3 + 5 × 3) = 158 square decimeters.