samochod osobowy przejechal droge 14km w czasie 15min a dalsze 126km w czasie 1godz i 45min. ile wynosi szybkosc srednia samochodu na calej trasie?
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s1=14km
t1=15min
s2=126km
t2=1h45min
V=?
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s=s1+s2=14km+126km=140km
t=t1+t2=15min+1h45min=2h
V=s/t=140km/2h=70km/h