Estimating and Costing
As per Indian Standard Specifications, the peak discharge for domestic purposes per capita per minute, is taken

1.80 liters for 5 to 10 users
1.35 for 20 users
1.20 liters for 15 users
All of these

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

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

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