Sum of the edges

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

Correct result:

S =  216 cm2

Solution:

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

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