s=30km
t=90min=1.5h
v=?
v=s/t
v=30/1.5=20km/h
Średnia prędkość wynosi 20 km/h
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s=30km
t=90min=1.5h
v=?
v=s/t
v=30/1.5=20km/h
Średnia prędkość wynosi 20 km/h