Respostas

2013-11-26T15:48:07-02:00
1200 m → 1,2 km
20 min → 1/3 h

\boxed{V_m= \frac{ \frac{12}{10} }{ \frac{1}{3} } = \frac{12}{10}. \frac{3}{1}  = \frac{36}{10} =3,6~km/h}
  • Usuário do Brainly
2013-11-26T23:51:20-02:00
1200 m equivale a 1,2 Km =  \frac{12}{10}
20 min equivalem a  \frac{1}{3} h

Vm =  \frac{distância}{tempo}

Vm =  \frac{12/10}{1/3}

Vm =  \frac{12}{10}  \frac{3}{1}

Vm =  \frac{36}{10}

Vm = 3,6

logo: 3,6 Km/h