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a=5cm
V=25cm²*5cm=125cm³
Pc=a kwadrat*6
150= a kwadrat*6
a kwadrat=25
a=5cm
a-krawędż
Obj=a szcześcian
Obj=5*5*5=125cm sześciennych
V- objętość
P= 6 x a²
150 = 6 x a² | :6
25 = a²
a = 5 cm
V= a³
V= 5³
V= 125cm³