Question

5 muncitori ......... 18 zile ........8 h
9 muncitori ...........x zile ........8 h

Answer 1

5 muncitori........18 zile
9 muncitori.........x
x=$\frac{5*18}{9}=10$

Answer 2

5m...................18z..............8h
9m....................x.................8h  marimile sunt invers proportionale

x=5*18/9
x=5*2=10zile