Zamień czas podany w godzinach na sekundy : 1h= s 1/2 h = s 4h = s o,o2h= s 12h = s 0,25h = s

1 h = 60 s  1/2 h = 30 s  4 h = 240 s 2h = 120 s 12 h = 720 s 0,25 h = 15 s 

1h=3600s 1/2h=1800s 4h=3600s*4=14400s o,o2h=72s 12h=3600s*12=43200s  0,25h = 900s