Question

Coronita!!!! 6muncitori termina o lucrare in 30 zile lucrand 8 ore pe zi. 10 muncitori , lucrand cate 6 ore pe zi in cat timp termina lucrarea?

Answer 1

$6~muncitori...................8~ore...................30~zile \\ 10~muncitori.................6~ore...................x~zile \\ ---------------------- \\ 30~muncitori.................8~ore..................6~zile \\ 30~muncitori.................6~ore.................. \frac{x}{3}~zile \\ ---------------------- \\ \frac{x}{3}= \frac{6*6}{8} \Leftrightarrow \frac{x}{3}= \frac{9}{2} \Rightarrow x= \frac{27}{2}~(dintr-o~zi). \\ \\ Lucrarea~va~fi~terminata~in~13~zile~si~12~ore.$