Big cube

Calculate the surface of the cube, which is composed of 64 small cubes with an edge 1 cm long.

Correct result:

S =  96 cm2

Solution:

a1=1 cm a2=643⋅ a1=643⋅ 1=4 cm  S=6⋅ a22=6⋅ 42=96 cm2

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