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1/3*4πR² = 48π |:1/3
4πR² = 144π |:4π
R² = 36
R = √36
R = 6
V = 4/3πR³
V = 4/3*π*6*6*6
V = 4/3π*216
V = 288π [cm³]
P=4πr²
1/3*4πr²=48π
4/3πr²=48π
r²=48π*3/4/π
r²=144/4
r²=36
r=6 cm
V=4/3π*6³
V=4/3π*216
V=288π cm³
P=144πcm²
P=4πr²
4πr²=144πcm² /:π
4r²=144cm² /:4
r²=36cm²
r=√36cm²
r=6cm
V=4/3πr³
V=4/3π6cm³
V=4/3π216cm³
V=288cm³
odp: Objętość kuli wynosi 288cm³