Estimating and Costing
Pick up the correct statement in case of water supply.

Pipes laid in trenches and pipes fixed to walls are measured separately
Cutting through walls and floors are included with the item
All of these
Pipes are classified according to their sizes and quality

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

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

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