# A parabolic grassed water channel $8 \mathrm{~m}$ wide at the top and $60 \mathrm{~cm}$ deep is laid on a slope of $3 \%$. Assuming the value of 'n' in Manning's formula as $0.04 \mathrm{~m}^{-1 / 3} \mathrm{~s}$, the discharge capacity (in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ ) of the channel (rounded off to two decimal places) is____________

## Question ID - 156454 :- A parabolic grassed water channel $8 \mathrm{~m}$ wide at the top and $60 \mathrm{~cm}$ deep is laid on a slope of $3 \%$. Assuming the value of 'n' in Manning's formula as $0.04 \mathrm{~m}^{-1 / 3} \mathrm{~s}$, the discharge capacity (in $\mathrm{m}^{3} \mathrm{~s}^{-1}$ ) of the channel (rounded off to two decimal places) is____________

3537

Answer Key : (7.35 to 7.55) -

7.35 to 7.55

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Undisturbed soil sample is collected from a field when the soil moisture is at field capacity. The inside diameter of the core sampler is $7.5 \mathrm{~cm}$ with a height of $15 \mathrm{~cm}$. Weight of the core sampling cylinder with moist soil is $2.81 \mathrm{~kg}$ and that with oven dry soil is $2.61 \mathrm{~kg}$. The weight of the core sampling cylinder is $1.56 \mathrm{~kg}$. Assuming $\pi=3.14$, the water depth in centimeter per meter depth of soil ( rounded off to two decimal places) is____________ 