17:5:45-14:25:30=2:40:15 (2 ore, 40 min, 15 sec)
a) 10:30:40-10:25:00=0:5:40 (5 min, 40 sec)
b) 10:25:00 - 8:15:20 = 2:09:40 (2 ore, 9 min, 40 sec timp petrecut in mers pana la prima statie)
12:30:55-10:30:40=2:00:15 (2 ore, 15 sec timp petrecut in mers intre cele doua statii)
Timp total petrecut in mers : 2:09:40 + 2:00:15 = 4:09:55 (4 ore, 9 min, 55 sec)
Unitatea de masura pentru timp in S.I. este secunda.
9 zile = 9*24*3600 = 777600 secunde
8 ore = 8*3600 = 28800 secunde
16 min = 16*60= 960 sec
Total : 777600 + 28800 + 960 = 807360 secunde pana la vacanta
Explicatie :
1 zi = 24 ore
1 ora = 60 min = 3600 sec
1 min = 60 sec
[tex]0.3\ min = \frac{3}{10}\ min = \frac{3}{10} *60\ sec = 18\ sec[/tex]