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ajutorrrrrr pls rapidddd dau coroana !!!!

Ajutorrrrrr Pls Rapidddd Dau Coroana class=

Răspuns :

1.vm=Δx/Δt
Δx=30km=30*1000=30000m
Δt=10 min=10*60=600s
vm=30000/600=5 m/s
2.Δx=80km=80*1000=80000 m
  vm=60 km/h=60*1000/3600=16.6 m/s
  vm=Δx/Δt=>Δt=Δx/vm=80000/16.6=4819.277s