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

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

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Estimating and Costing
In the mid-section formula

All of these
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
The area of mid-sections is calculated by using mean depth

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