centre line method is used for calculation of

Solution (By Examveda Team)

The correct answer is D: all.

Here's why:

The centre line method is a technique used in quantity surveying and cost estimation.
It simplifies the calculation of lengths and subsequently, the quantities of materials required for construction.

The key idea is to calculate the length of the structure along the centre line of its walls.
This method can be applied to various types of structures, regardless of their specific design or purpose.

* Building: Centre line method is commonly used for buildings to calculate the lengths of walls, footings, and other structural elements.
* Culvert: It can be applied to culverts for estimating excavation and concrete quantities.
* Well: Although less common for wells, the principle can still be used for estimating the perimeter of the well structure.

Therefore, the centre line method is applicable to buildings, culverts, and wells.