Question

299 muncitori pot termina o lucrare in 130 zile. Dupa ce lucreaza 4 zile , 182 muncitori pleaca. Cate zile va mai dura lucrarea?

Answer 1

299m.............1lucrare........................130z
299m................x........................................4z
x=4*1/130=2/65

1-2/65=  65-2/65=  63/65

299m................1lucrare.....................130z
177m...................63/65..........................y

130/y=177/299 *1/ 63/65
130/y=177/299*65/63
130y=11506/18837
y=130*18837/ 11506
y=2448810/11506
y=212,83≈ 213

4+213=217 zile termina toata lucrarea