5m+5m 5m+5m 5m+5m 5m+5m
|_______|________|________|________|=>zid
4zle 4zile 4zile 4zile.......=>16 zile
=> 10 muncitori lucreaza.in 4 zile ...=>1/4(16)....=>termina zidul in 16 zile
20 muncitori lucreaza in 2 zile....=>1/4(8).......=> termina zidul in 8 zile
5m+5m+5m 5m+5m+5m 5m+5m+5m 5m+5m+5m
|___________|___________|__________|____________|=>zid
3zile 3zile 3zile 3zile..........=>12 zile
15 muncitori lucreaza in 3 zile...=>.1/4(12)...=> termina zidul in 12 zile
12/12-1/4=3/4
3/4(12)=9 zile
4zile+9zile=11 zile lucrate pentru terminarea zidului.........=>
15muncitori lucreaza in 3 zile aceeasi portiune de zid cat 10 muncitori in 4 zile.
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15:3=5 zile mai putin......=> 16-5=11zile lucrate pentru terminarea zidului
11-4-9 zile lucrate in 15 muncitori
