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V=?
V=s/t
Dane:
t= 15 min.= 0,25 h.
s= 4 km.
V= 4:0,25= 16 km/h.
czas = 15 minut = 0,25 h (godzina ma 60 minut)
predkość = droga/czas = 4/0,25 = 16 km/h