Respostas

2014-03-05T22:19:59-03:00
Vm=Δs/Δt
Vm=180km/h=50m/s
Δs=150+200=350m
Δt=?

Δt=Δs/Vm
Δt=350/50
Δt=7s
Espero ter ajudado.
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