Box

The cardboard is a box-shaped quadrangular prism with a rhombic base. Rhombus has a side 5 cm, one diagonal 8 cm long, and the box's height is 12 cm. The package will open at the top.

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

Correct answer:

S =  277.2 cm2

Step-by-step explanation:

a=5 cm u=8 cm h=12 cm  q=100%+5%=1+1005=1.05  S1=a h=5 12=60 cm2 s=(a+a+u)/2=(5+5+8)/2=9 cm S2=s (sa) (sa) (su)=9 (95) (95) (98)=12 cm  S=q (4 S1+2 S2)=1.05 (4 60+2 12)=277.2 cm2



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