Respostas

2014-05-10T15:43:35-03:00
2 km = 2000m
Meia hora = 30 minutos = 1800 segundos

V = 2000m
      ----------
      1800 s
V = 1,1111111111111¨¨¨¨¨¨¨m/s ou 10/9 m/s
1 2 1
2014-05-10T15:43:51-03:00
0,55555555555555555555.....m/s