The gutter flow in a road is designed to be Q $=0\mathrm{.}113$m$3/$s on concrete

finish $($n $=0\mathrm{.}016).$ The gutter has the reciprocal of the cross slope z $=$

$1/$Sc$=20,$ and a slope of S $=1\%.$ For a curb depression of $40$ mm$,$ find the required inlet length to intercept the

entire flow and the capacity of a $3-$m$-$long curb inlet.