Body diagonal - cube

Calculate the surface and cube volume with body diagonal 15 cm long.

Correct result:

S =  450 cm2
V =  649.5191 cm3

Solution:

u=15 cm a=u/3=15/3=5 3 cm≐8.6603 cm  S=6⋅ a2=6⋅ 8.66032=450 cm2
V=a3=8.66033=649.5191 cm3

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