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a) 27 cm 3
V = a³
a = ∛27
a = 3
Pc = 6a² = 6*9 = 54 cm²
b) 729litra = 729 dm³
a= ∛729
a = 9
Pc = 6 * 9² = 486 dm²
c) ∛64 = 4
a = ∛4
Pc = 6 * (∛4)² = 6 * (4 do potęgi 3/2)