Problem #$7$

A sanitary sewer system has a diameter of ${18}^{\text{'}}$ that discharges at average daily flow conditions

$($i$.$e$.,$ pipe is half full$).$ The pipe is made of concrete and classified as in very good condition

$(n=0\mathrm{.}0013).$

The elevation of the pipe at manhole $150$ is $325ft$ and at manhole $151$ is $322ft.$ The distance

between manhole $150$ and $151$ is $300ft.$

Determine the velocity in the pipe and the flow rate $($use manning's equation$)$