Respostas

2014-02-28T14:59:12-03:00
Olá

 1metro tem------ 100cm
 12 metros_______x
    x=12x100
   x=1200cm
1 5 1
2014-02-28T15:02:31-03:00
Resolve com regra de 3
1m............100cm
12m...........x

1.x=12.100
   X=1200/1
   X=1200
1 5 1