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= ×3,14×
=×3,14×27
=113,04
dit V.bola....?
4/3. πr3
4/3. 3,14.9³
V.bola = 3052,08cm2
2.LP= 4.π.r²
1808,64= 4. 3,14. r²
1808,64:4:3,14= r²
144 = r²
r= √144
r= 12
V.bola= 4/3.π.r³
= 4/3. 3,14.12³
=7234,56