Respostas

2013-08-08T11:27:27-03:00
S= 1200m / 1000= 1,2Km
t= 4min / 60= 0,06h

Vm= s/t
 
Vm= 1,2/0,06
Vm= 20km/h

2013-08-08T13:45:03-03:00