Respostas

2013-10-15T12:36:38-03:00
Simples: Regra de 3 Composta:

Escavadeira(E) ------- Metros(M) --------- Dias
14E------- 1400M --------- 4D
8E------- 2100M --------- XD

 \frac{4}{x} =  \frac{1400}{2100}* \frac{8}{12}
X = 9

Aplica-se 2/3

 \frac{2}{3} * 9 = 6
2 5 2