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kwadrans=15min=15*60s=900sekund
1h=60min=60*60=3600sekund
b) 360s=360:60=6min
2h=120min
3 kwadranse=45min
c) 2 doby=48godzin
4 kwadranse=1 godzina
połowa doby=24:2=12 godzin