Problem $10$: An earthen dam will be built over a pervious layer. The longitudinal length of the pervious layer below the dam is $750ft,$ and it is $10ft$ thick with a coefficient of permeability of $0\mathrm{.}03i\frac{n}{m}in.$ The level of water at the downstream is maintained at $2,998ft.$ The flow of water in gallon$/$day $(gpd)$ in the pervious material is most nearly:

Pervious material $=10ft$ thick $1f{t}^3=7\mathrm{.}48$ gallon

$K=0\mathrm{.}03i\frac{n}{m}in$

A$)1,900gpd$

B$)6,300gpd$

C$)8,900gpd$

D$)14,200gpd$