Cube edges

The sum of the lengths of the cube edges is 42 cm. Calculate the surface of the cube.

Correct result:

S =  73.5 cm2

Solution:

s=42 cm n=3 4=12 a=s/n=42/12=72=3.5 cm  S=6 a2=6 3.52=1472=1472 cm2=73.5 cm2



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