# Box

Cardboard box shaped quadrangular prism with a rhombic base. Rhombus has a side 5 cm and one diagonal 8 cm long and height of the box is 12 cm. The box will open at the top.

How many cm2 of cardboard we need to cover overlap and joints that are 5% of area of cardboard?

Correct result:

S =  277.2 cm2

#### Solution:

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