Estimating and Costing
The cross-sections for a highway is taken at

Right angle to the centre line
30 meters apart
Intermediate points having abrupt change in gradient
All of these

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Estimating and Costing
In the mid-section formula

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

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