Problem$-3$: In the horizontal pipe shown in the figure, $h=0\mathrm{.}50m,d_A=0\mathrm{.}3m,d_B=0\mathrm{.}12m,d_C=0\mathrm{.}2m.$ Find the discharge $Q$ and the pressure at point $C,$ if the pressure at point $A$ is $17000$ Pa and the liquid has a density of $850k\frac{g}{m^3}.$ Neglect friction losses.

$(6$ points$)$

$A=\frac{d^2}{4}$;$,Q=V_A{A}_A=V_A{A}_j=V_C{A}_C$

$z_A+\frac{P_A}{g}+\frac{V_A^2}{2g}=z_k+\frac{P_A}{g}+\frac{V_A^2}{2g}=z_e+\frac{P_c}{g}+\frac{V_f^2}{2g}$