Cube and sphere



S =  235.619 cm2


S1=150 S1=6a2 a=S1/6=150/6=5 D=3 a=3 55 38.6603 r=D/2=8.6603/24.3301 S=4π r2=4 3.1416 4.33012235.6194235.619 cm2S_{1}=150 \ \\ S_{1}=6a^2 \ \\ a=\sqrt{ S_{1}/6 }=\sqrt{ 150/6 }=5 \ \\ D=\sqrt{ 3 } \cdot \ a=\sqrt{ 3 } \cdot \ 5 \doteq 5 \ \sqrt{ 3 } \doteq 8.6603 \ \\ r=D/2=8.6603/2 \doteq 4.3301 \ \\ S=4 \pi \cdot \ r^2=4 \cdot \ 3.1416 \cdot \ 4.3301^2 \doteq 235.6194 \doteq 235.619 \ \text{cm}^2



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