Răspunsuri

2014-06-23T16:37:41+03:00
10m.........6z
15m..........x

x=10*6/15   sunt marimi invers proportionale

x=10*2/5= 2*2=4zile
2014-06-23T16:39:01+03:00
Folosesti regula de trei simpla, la marimi invers proportionale.
  10m.......6 zile
  15m.......x zile
x=10x6/15=4 zile