Réponses

2014-03-23T15:27:05+01:00
55 min: 55/60=5x11/5x12=11/12 h
165 min: 165/60=33x5/12x5=33/12=11x3/4x3=11/4 h
30 s: 30/3600=30/30x120=1/120 h
1 s : 1/3600 h
0,5 s : 0,5/3600=1/7200 h