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ile to minut: 2/3 h 1 i 1/3h

Odpowiedź :

1 h = 60 min

2/3 h = 2/3 * 60 min = 2 * 20 min = 40 min

1 1/3 h = 4/3 * 60 min = 4 * 20 min = 80 min