7h.......................190mA
x h ....................250mA
___________________i.p.
[tex]7\cdot 190=x\cdot 250 \Rightarrow x=\frac{7\cdot 190}{250}=\frac{133}{25}h\\ \\ 133:25=5h+\frac{8}{25}h=5h+\frac{8}{25}\cdot 60min=5h \ si \ 19min+\frac{5}{25}min=5h \ si \ 19min+ \ \frac{5}{25}\cdot 60 s=5h \ si \ 19min \ si \ 12s[/tex]
