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1/3h + 41 min + 180s + a = 2h si 20 min; 2 saptamani + 3 zile + c = 24 zile; 1/6 h + 1/4 h + 1 1/2h + b = 4 h; 360 s + 10 min + 2 h + d = 3 h; rezolvarea completa va rog!! REPEDE!!! DAU COROANĂ!!