Estimating and Costing
The measurement is made in square metre in case of

None of these
Cement concrete in foundation
Hollow concrete block wall
R.C.C. structure

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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
The end sections are parallel planes
The mid-area of a pyramid is half the average area of the ends
All listed here

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Estimating and Costing
Pick up the incorrect statement regarding a master trap from the following:

The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe
It is provided a cleaning eye at the top of the trap
It is provided in between the lower end of the house drain and the street sewer
The water seal is less than that of ordinary traps

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