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

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

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Estimating and Costing
The correct Prismoidal formula for volume is

D/3 [first area + last area + 4 Ʃ Even area + 2 Ʃ odd areas]
D [first area + last area + Ʃ Even area + 2 Ʃ odd areas]
D/3 [first area + last area + 2 Ʃ Even area + 4 Ʃ odd areas]
D/6 [first area + last area + 2 ∑ Even area + 4 ∑ odd areas]

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

It is provided in between the lower end of the house drain and the street sewer
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
The water seal is less than that of ordinary traps

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