Răspuns :
[tex] \frac{2}{5} din 30 = \frac{2*30}{5} = \frac{60}{5} =12
\frac{2}{6} din 30 = \frac{2*30}{6} = \frac{60}{6} =10
[/tex]
30-(12+10)= 30-22=8 litri
Dimineata 10 l
Prinz 12 l
Seara 8l
30-(12+10)= 30-22=8 litri
Dimineata 10 l
Prinz 12 l
Seara 8l