Cube and sphere

Cube with the surface area 150 cm2 is described sphere. What is sphere surface?

Correct result:

S =  235.6194 cm2

Solution:

S1=150 S1=6a2 a=S1/6=150/6=5 D=3⋅ a=3⋅ 5=5 3≐8.6603 r=D/2=8.6603/2≐4.3301 S=4π⋅ r2=4⋅ 3.1416⋅ 4.33012=235.6194 cm2

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