Question $4-$ Fluid Mechanics

$[$Total $25$ Marks$]$

An incompressible liquid of density $1000k\frac{g}{m^3}$ enters through at cross$-$section $1($as shown in Figure Q$4)$ with a volumetric flow rate $Q_1=0\mathrm{.}02\frac{m^3}{s},$ and an area $A_1=200c{m}^2.$ The fluid mixes with a fluid of the same density $(1000\frac{kg}{m^3})$ entering through cross$-$section $2$ with the same area and flow rate $(($:$Q_2=0\mathrm{.}02\frac{m^3}{s},A_2=200c{m}^2$