Situation $1.$ The flow rate of water through the pipe system shown in the figure is $45\frac{L}{s}$ under total head loss of $8\mathrm{.}5m.$ Assume $C=120$ for all pipes.

$10.$ Calculate the flow through Line $B$ in L$/$s$.$

A$.18\mathrm{.}4$

C$.22\mathrm{.}1$

B$.20\mathrm{.}7$

D$.24\mathrm{.}6$

$11.$ Calculate the head loss in Line $B$ in meters.

A$.2\mathrm{.}63$

C$.3\mathrm{.}04$

B$.2\mathrm{.}85$

D$.3\mathrm{.}39$

$12.$ Determine the diameter of Line $C$ in $mm.$

A$.140$

C$.160$

B$.150$

D$.170$