1.
1 tydzień= 24h * 7 = 168 h
1 miesiąc= 24h * 30 = 720 h
1 rok= 24h * 365 = 8760 h
2.
1s=1000ms
200ms=200/1000 s = 0,2s = 1/5 s
3.
1min=1/60 h
20min = 20/60 h =1/3 h
200min = 200/60 h =3 i 1/3 h
4.
0,6h = 60 * 0,6min = 36 min = 60 * 36s = 2160s
0,2h = 60 * 0,2min = 12 min = 60 * 12s = 720s