Respostas

2014-02-25T16:37:31-03:00
Resposta


20 minutos = 20 /60 = 2/6 = 1/3h
S = 60km

Velocidade

V = S/t
V = 60/1/3
V = 60 . 3 /1
V = 180km/h

500mm / 1000 = 0,5m