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t=20 minut
s=20 km
Szukane :
v=?
wzór v=s/t
v=20 km/20 minut
v=1 km/min
V = ?
s = 20km
t = 20min = 20/60h = 1/3h
V = 20km/1/3h = 20km*3h = 60km/h
Koniec ;]