Estimating and Costing
Carpet area does not include the area of

Kitchen and pantry
All of these
Bath room and lavatory
The walls along with doors and other openings

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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
The end sections are parallel planes
All listed here
The volume of the Prismoidal is over-estimated and hence a Prismoidal correction is applied

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