Respostas

2013-11-21T20:54:07-02:00
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extamaente
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2013-11-21T20:56:48-02:00
150min ______ 15km
   x       ______ 54km

15x =   8100
 x = 8100/15
 x = 540min

540min = 9 Horas.
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