3 obreros --------------> 5 horas
5 obreros -------------> x horas
x Horas = 3 o x 5 h / 5 h.
x h = 15 o.h / 5 h
x h = 3
5 obreros se tardan 3 horas.
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3 obreros --------------> 5 horas
5 obreros -------------> x horas
x Horas = 3 o x 5 h / 5 h.
x h = 15 o.h / 5 h
x h = 3
5 obreros se tardan 3 horas.