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

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