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V = 36: (3,14)²
V = 36 : (π²)
V = 4/3*π*r³ - wzór na pole kuli
4/3*π*r³ = 36 : (π²) /*(3/4)
π*r³ = 36*(3/4) : (π²)
π*r³ = 27 : π² /*π²
π³*r³ = 27
r³ = 27 : π³
r = ∛27 : ∛π³
r = 3 : π
r = 3/π
r = 3/ 3,14
Odp. Promień kuli wynosi r = 3/π = 3/3,14