Respostas

2014-07-24T16:28:25-03:00
V = 80 km/h
to = 7:30
so = 240
sf = 300

300-240 = 60km
V = S/t
80 = 60/t 
t = 60/80 
t = 0,75h
t = 45 minutos

tf = 7:30 + 45
tf= 8:15 h