Amir cuts out a net that folds into an open-top rectangular box (no lid). The net consists of 1 square base of side 12 cm and 4 identical rectangular walls. Each rectangular wall has a height of 4 cm. What is the total area of Amir's net?
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Worked Solution
Step 1: Calculate the area of the square base.
Base: 12 cm × 12 cm = 144 cm²
Step 2: Calculate the area of the 4 rectangular walls.
Each wall: 12 cm × 4 cm = 48 cm²
4 walls: 4 × 48 = 192 cm²
Step 3: Add base and walls (no lid for an open-top box).
144 + 192 = 336 cm²
Answer: 336 cm²
Correct answer: 336 cm²
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