Irrigation Engineering
If d1 is the depth of cutting, d2 is the height of the bank from bed level r2 : 1 and r1 : 1 are the slopes in filling and cutting respectively, the horizontal distance n between the bed and bank, is

x = r1 d1
x = r2 d2
x = d1 / r1
x = d2 / r2

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Irrigation Engineering
If A is the area of the surface, x̅ is the depth of its C.G. from the surface of the water and ω is the density of water, then

Total pressure on the surface is equal to ωx̅
Depth of the centre of pressure is 2/3H vertically below the surface
Depth of the point at which total pressure acts is equal to its moment of inertia divided by Ax̅
All listed here

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Irrigation Engineering
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below :

Both A and R are true but R is not the correct explanation of A
A is false but R is true
Both A and R are true and R is the correct explanation of A
A is true but R is false

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