# Cuboid box

Cuboid box have dimensions of 30 cm, 25 cm and 40 cm. Sketch its network and compute surface area of box.

Result

S =  5900 cm2

#### Solution:

$a=30 \ \text{cm} \ \\ b=25 \ \text{cm} \ \\ c=40 \ \text{cm} \ \\ \ \\ S=2 \cdot \ (a \cdot \ b+b \cdot \ c+a \cdot \ c)=2 \cdot \ (30 \cdot \ 25+25 \cdot \ 40+30 \cdot \ 40)=5900 \ \text{cm}^2$

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Math student
Makes no sense still...

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