Fig $1$

$2.$ The horizontal pipe network as shown below is being fed in at reservoir $R$ and drawn off at A$,$ B$,$ C and D$.$ Using Hazen Williams formula V $=0\mathrm{.}85C{R}^{0\mathrm{.}63}{S}^{0\mathrm{.}54}$ with $C=100,$ determine the flows in the pipe network by Hardy$-$Cross Method. Assume initial value of flow in pipe $AB$ as $130\frac{l}{s}$ from $A$ to $B.$

Note: You need to compute only $2$ trials.

rig$$