Cube

The sum of all cube edges is 30cm. Find the surface area of the cube.

Correct result:

S =  37.5 cm2

Solution:

s=30 cm a=s/12=30/12=52=2.5 cm  S=6 a2=6 2.52=752=752 cm2=37.5 cm2



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Dr Math
>>> Is the sum of all edges 30 or 80?

typo fixed, thank you!

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