Respostas

2013-10-07T19:06:32-03:00
S1= VxT
S= 70 x 4
S= 280 km
S2=VxT
S= 50 x 4
S= 200 km
 VM= D/TVM= (280+200)/ (4+4)
VM= 480/ 8
VM= 60 km/h
2 4 2