Respostas

2014-08-09T14:32:14-03:00
1200 m = 1,2 km
20m = 1/3 h
12/10 / 1/3 => 12/10 * 3/1 => 36/10 => 3,6 km/h
2014-08-09T14:40:12-03:00
20 minutos * 60 = 1200 s

V = S/t
V = 1200/1200
V = 1 m/s

1 m/s * 3,6 = 3,6 km/h