Respostas

2014-04-25T17:14:00-03:00
20 km /h = delta S / 1h
S = 20 Km na primeira hora

30Km / h = delta S / 2 h
S = 60 Km na segunda hora

delta S total = 80 Km

Vm = 80 /3

Vm = 26,66 km/h
2014-04-25T17:17:38-03:00