Metal box

How much metal we need for the production of box with dimensions 5 dm, 30 cm and a height of 1 m?
Add 12% of the waste and folds.

Correct result:

x =  2.576 m2

Solution:

x=1.12⋅ 2⋅ (0.5⋅ 0.3+0.5⋅ 1+1⋅ 0.5)=322125=2.576 m2x=1.12 \cdot \ 2 \cdot \ (0.5 \cdot \ 0.3+0.5 \cdot \ 1+1 \cdot \ 0.5)=\dfrac{ 322 }{ 125 }=2.576 \ \text{m}^2

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