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x = bok kwadratu, x² = 1500 ---> x = √1500 = 10√15 ≈ 38,73 m
2. obj. prostopadłościanu V = 2,5 * 1 * 2 = 5 m³
wody jest 3/5 * V = 3/5 * 5 = 3 m³
1 m³ = 1000 l
3 m³ = 3000 l
GOTOWE!!!