For the three$-$pipe series system shown in the figure, the total pressure drop is $p_A-p_B=15$kPa, and the elevation drop is $z_A-z_B=5m.$ The fluid is water with a density of $=1000k\frac{g}{m^3}$ and kinematic viscosity of $v=1\mathrm{.}02{10}^{-6}\frac{m^2}{s}.$ The pipe data are

$\backslash$table$[[$Pipe$,L(m),D(cm),(mm)$