Respostas

2014-08-18T10:12:06-03:00

20 min = 1200 seg

logo > 900 m
------------
1200 s
resposta :0,75 m/s


900m = 0,9 km
20 min = 1/3 h


0.9 km
----------------- resposta :2.7 km/h
1/3
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