Estimating and Costing
In the mid-section formula

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

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Estimating and Costing
Pick up the correct statement regarding the centre line method of estimating a building

The centre line is worked out separately for different sections of walls of a building
All of these
The centre line length is reduced by half the layer of main wall joining the partition wall
Product of the centre line of the walls and area of cross-section of any item, gives total quantity of the item

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Estimating and Costing
The assumption on which the trapezoidal formula for volumes is based, is

The volume of the Prismoidal is over-estimated and hence a Prismoidal correction is applied
All listed here
The end sections are parallel planes
The mid-area of a pyramid is half the average area of the ends

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