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t1=30km/h / 1km = 1/30h
t2= 50km/h / 5km = 0.1h= 3/30h
Vsr= (S1 + S2) / (t1 + t2)
Vsr= 6km / 4/30h
Vsr= 45km/h
Mam nadzieje ze dobrze.
Vśr=
t=s/v
t₁=1/30h
t₂=3/30h
Vśr=6km/(4/30h)=45 km/h