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8 20
8 - 6 = 2 x
8 . 20 = 2x
160 = 2x
80 = x
Regla de 3 inversa.
A menos obreros mas dias.
8h--------------> 20d
2h--------------> x
x = 8h * 20d/2h
x = 160d/2
x = 80d
Respuesta.
Opcion C