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Vd=Pp*h (Vd - objętość drutu)
Pp=πr²
h=12 cm
Ф=24 cm
r=1/2Ф=12 cm
Pp=3,14*12²
Pp=3,14*144
Pp=452,16 cm²
Vd=452,16*12
Vd=5425,92 cm³
Vk=4/3πr³ (Vk - objętość kulki)
r=3 cm
Vk=4/3*3,14*3³
Vk=113,04 cm³
Vd/Vk=5425,92/113,04
Vd/Vk=48 <---- tyle kulek otrzymano