To calculate the surface area of a box (rectangular prism), you can use the following formula:
\[ \text{Surface Area} = 2 \times (length \times width + length \times height + width \times height) \]
Given:
- Width = 2.5 cm
- Length = 8 cm
- Height = 10 cm
Let's calculate it step by step.
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Calculate each product:
- Length × Width = 8 cm × 2.5 cm = 20 cm²
- Length × Height = 8 cm × 10 cm = 80 cm²
- Width × Height = 2.5 cm × 10 cm = 25 cm²
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Now, sum these areas:
- Total area = 20 cm² + 80 cm² + 25 cm² = 125 cm²
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Then, multiply by 2 for the total surface area:
- Surface Area = 2 × 125 cm² = 250 cm²
So, the surface area of the box is 250 cm².