ma=[v₁+v₂+v₃]/3=50km/h
⇒S=v₁+v₂+v₃=50km/h·3
⇒S=v₁+v₂+v₃=150km/h;
⇒PRIMA ZI= 20KM/H
⇒A DOUA ZI=30 KM/H
⇒A TREIA ZI ⇔20KM/H+30KM/H+x=150km/h
⇒A TREIA ZI⇔x=150km/h-[20km/h+30km/h]
⇒A TREIA ZI⇔150km/h-50km/h
⇔A TREIA ZI=100KM/H;
⇒VITEZA MEDIE A CAMIONULUI IN A DOUA JUMATATE DE DRUM ESTE
50KM/H/2
⇒25KM/H;