Question

Ajutooor pls!!! Cinci muncitori termina o lucrare in 18 zile lucrand cate 8 ore pe zi. In cate zile ar putea termina aceeasi lucrare 9 muncitori , daca vor lucra cate 10 ore pe zi?

Answer 1

$5\ \ muncitori\ \ ............\ \ 18\ \ zile\ \ .............\ \ 8\ \ ore \\ \\ 9\ \ muncitori\ \ ............\ \ x\ \ zile\ \ ...............\ \ 10\ \ ore \\ \\ x= \frac{5*18*8}{9*10} =>x= \frac{720}{90} =>x=8\ \ zile$

Answer 2

5m.....18zile.....8h 9m.....x zile......10 h 18 zile*8h/zi= 144 h 5m.......144 h 9m.....z zile 5*144=9*z Zz 80h x= 80h: 10 x=8 zile