in 8 zile o echipa de muncitori executa 720 de piese.In cat timp executa echipa 1890 piese de acelasi tip?

Răspuns :

8z……d.p………720p
x z…………….....1890p

[tex]\dfrac{8}{x}[/tex]= [tex]\dfrac{720}{1890}[/tex]

x= [tex]\dfrac{8\cdot 1890}{720}[/tex]=21 de zile