In an experimental setup, the discharge through a triangular notch is $0.0074 \mathrm{~m}^{3} \mathrm{~s}^{-1}$ at an operating head of $0.1 \mathrm{~m}$. The coefficient of discharge for the notch is 0.7 . If the required discharge is $0.1 \mathrm{~m}^{3} \mathrm{~s}^{-1}$,the corresponding width of water surface in $\mathrm{m}$ is

(A) 0.80

(B) 0.099

(C) 0.00043

(D) 0.00086

In an experimental setup, the discharge through a triangular notch is $0.0074 \mathrm{~m}^{3} \mathrm{~s}^{-1}$ at an operating head of $0.1 \mathrm{~m}$. The coefficient of discharge for the notch is 0.7 . If the required discharge is $0.1 \mathrm{~m}^{3} \mathrm{~s}^{-1}$,the corresponding width of water surface in $\mathrm{m}$ is

(A) 0.80

(B) 0.099

(C) 0.00043

(D) 0.00086

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