Sum of the edges

The sum of the lengths of all cube edges is 72 cm. How many cm2 of colored paper are we going to use for sticking?

Correct answer:

S =  216 cm2

Step-by-step explanation:

o=72 cm o=12 a a=o/12=72/12=6 cm  S=6 a2=6 62=216 cm2

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