Estimating and Costing
The ground surface slopes 1 in 50 along a proposed railway embankment 150 m in length. The height of the embankment at zero chainage is 0.5 m, the width is 11 m and side slopes 2:1. If the falling gradient of the embankment is 1 in 150, the quantity of the earthwork calculated by Prismoidal formula, is

3275 m³
3225 m³
3250 m³
3300 m³

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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
All of these
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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