# A rectangular channel having a bed slope of $0.0001,$ width $3.0 \mathrm{~m}$ and Manning's coefficient 'n' $0.015,$ carries a discharge of $1.0 \mathrm{~m}^{3} / \mathrm{s} .$ Given that the normal depth of flow ranges between $0.76 \mathrm{~m}$ and $0.8 \mathrm{~m}$. The minimum width of a throat (in $\mathrm{m}$ ) that is possible at a given section, while ensuring that the prevailing normal depth is not exceeded along the reach upstream of the contraction, is approximately equal to (assume negligible losses) (A) 0.64 (B) 0.84 (C) 1.04 (D) 1.24

## Question ID - 156045 :- A rectangular channel having a bed slope of $0.0001,$ width $3.0 \mathrm{~m}$ and Manning's coefficient 'n' $0.015,$ carries a discharge of $1.0 \mathrm{~m}^{3} / \mathrm{s} .$ Given that the normal depth of flow ranges between $0.76 \mathrm{~m}$ and $0.8 \mathrm{~m}$. The minimum width of a throat (in $\mathrm{m}$ ) that is possible at a given section, while ensuring that the prevailing normal depth is not exceeded along the reach upstream of the contraction, is approximately equal to (assume negligible losses) (A) 0.64 (B) 0.84 (C) 1.04 (D) 1.24

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