Respostas

2014-08-05T15:41:00-03:00
15:30-13:00=2:30h

2h+ \frac{1}{2}h= \frac{4+1}{2}= \frac{5}{2}h

80= \frac{x}{5/2}

x= \frac{80}{1}* \frac{5}{2}=  \frac{400}{2}=200km

Então ele estará no marco, 200+126=326 km