Estimating and Costing
While estimating the qualities for the construction of a building, the correct metric unit is

Square meters for volume
Liter for capacity
Meter for length
Cubic metre for area

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Estimating and Costing
In the mid-section formula

The volume of the earth work is calculated by multiplying the mid-section area by the distance between the two original sections
The mean depth is the average of depths of two consecutive sections
All of these
The area of mid-sections is calculated by using mean depth

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