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A trapezoidal grassed waterway is constructed along a longitudinal gradient of $4 \% .$ If the crosssectional area of flow is $1.52 \mathrm{~m}^{2}$, wetted perimeter is $12.5 \mathrm{~m}$ and Manning's $n$ for the waterway is $0.04 \mathrm{~m}^{-1 / 3} \mathrm{~s}$, the flow through the waterway in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ is
(A) 1.9
(B) 2.1
(C) 2.3
(D) 2.5


Question ID - 157367 | Toppr Answer

A trapezoidal grassed waterway is constructed along a longitudinal gradient of $4 \% .$ If the crosssectional area of flow is $1.52 \mathrm{~m}^{2}$, wetted perimeter is $12.5 \mathrm{~m}$ and Manning's $n$ for the waterway is $0.04 \mathrm{~m}^{-1 / 3} \mathrm{~s}$, the flow through the waterway in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ is
(A) 1.9
(B) 2.1
(C) 2.3
(D) 2.5

1 Answer - 5876 Votes

3537

Answer Key : (A) -

(A) 1.9



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