Irrigation Engineering
If L is total length of a canal in kilometers, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is

PL/1000C
PC/100L
PLC/1000
100 PLC

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Irrigation Engineering
A counter berm is

A horizontal benching provided on the outside slope
A horizontal benching provided on the inside slope
A vertical benching provided on the inner edge of the bank
A vertical benching provided on the outer edge of the bank

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