[tex]8~robinete~......~3~h \\
4~robinete~......~x~h \\
------------------------- \\
Sunt~marimi~invers~proportionale \\ \\ \dfrac{8}{4}=\dfrac{x}{3} ==> x=\dfrac{8*3}{4}==> x=\dfrac{24}{4} ==> x = 6~h~
\\ \\ x=\dfrac{8*3}{4} ==> x=\dfrac{24}{4} ==> x = 6~h[/tex]