Respostas

2013-09-24T13:21:27-03:00
ΔT =  \frac{ΔS}{Vm}

ΔT =  \frac{40km}{30km/h}

ΔT =  \frac{4}{3}h


 ΔT_{2}  \frac{ΔS}{Vm}

 ΔT_{2}  \frac{40km}{60km/h}

 ΔT_{2}  \frac{2}{3}h


Vmt =  \frac{ΔSt}{ΔT+ΔT_{2} }

Vmt =  \frac{80km}{4/3h+2/3h}

Vmt =  \frac{80km}{6/3h}


Vmt = 30 km/h





4 1 4