Respostas

2014-07-30T00:50:31-03:00
1 km = 1000 metros
100 cm = 1 metro
1 min = 60 segundos

10,80km/1km=xm/1000m --> x= 10,80.1000 --> x=10800 metros
100cm/380cm=1m/xm --> 380=100x --> x=380/100 --> x=3,80 metros
1min/15min=60s/xs ---> x=900 segundos