In a drainage area of 15 ha, the slope and drainage coefficient are $0.4 \%$ and $11 \mathrm{~mm} /$ day, respectively. The value of Manning's roughness coefficient is $0.016 .$ The inside diameter (in $\mathrm{mm}$ ) of the corrugated plastic tubing used for drainage is
(A) 200.51
(B) 205.52
(C) 209.51
(D) 215.23
In a drainage area of 15 ha, the slope and drainage coefficient are $0.4 \%$ and $11 \mathrm{~mm} /$ day, respectively. The value of Manning's roughness coefficient is $0.016 .$ The inside diameter (in $\mathrm{mm}$ ) of the corrugated plastic tubing used for drainage is
(A) 200.51
(B) 205.52
(C) 209.51
(D) 215.23