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a fost răspuns

3h - 1h 15min 3sec =
5h 48min 33sec - 4h 18 min 38 sec =
2,5h - 1h 13 min 15sec =
6,75h - 3h 4 min 5 sec =

Răspuns :

1h 45 min 57 sec
1h 19 min 35sec
1h 37 min 15 sec
4h 11 min 5 sec