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45min/60min=3/4
4km*3/4=3km
3 kwadranse
kwadrans -15minut
3 razy 15= 45minut
4km/h *3/4= 3km
droga ma 3 kilometry
4/ 4 * 3 = 1 * 3 = 3km
Odp.:Droga do domu kolegi ma 3 km.