Resulting 3139

We place three identical cubes with an edge length of 3 cm on top of each other. What is the surface of the resulting block?

Correct answer:

S =  126 cm2

Step-by-step explanation:

a=3 b=a=3 c=3 a=3 3=9 S=2 (a b+b c+a c)=2 (3 3+3 9+3 9)=126 cm2

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