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δ = 8g/cm³
Vk = 4/3πr³
Vk = 4/3π* 1000
Vk = (4000 : 3 * π) cm³
Vk ≈ 4000 : 3 * 3,14
Vk ≈ 12560 : 3
Vk ≈ 4186,(6) cm³
m = V * δ
m ≈ 4186,(6) * 8
m ≈ 33493,(3)g = 33,49(3)kg
to jest odp ok. 32kg ; ))