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t=20s
V=?
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V=s/t=200m/20s=10m/s=0,01km/(1/3600h)=36km/h
V=s/t
V=200m/20 s
V= 10 m/ s
10m/s - 10 * 1/1000 : 1/3600= 10*3600:1000 = 36 km/h
Odp. Średnia prędkość wyniosła 10 m/s , a to jest 36 km/h.