Cuboid box

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

Correct result:

S =  5900 cm2

Solution:

a=30 cm b=25 cm c=40 cm  S=2⋅ (a⋅ b+b⋅ c+a⋅ c)=2⋅ (30⋅ 25+25⋅ 40+30⋅ 40)=5900 cm2

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