## What is the formula of Prismoidal?

1) Prismoidal Formula: From mensuration, volume of a prism having end faces is in parallel planes: V=L/6*(A1+A2+4Am) This is known as prismoidal formula.

**What is Prismoidal formula used for?**

A formula used in the calculation of earthwork quantities. It states that the volume of any prismoid is equal to one-sixth its length multiplied by the sum of the two end-areas plus four times the mid-area.

**What is Prismoidal in surveying?**

A prismoid is a solid whose end faces lies in parallel planes, which can be used for calculating the volume of the obtained figure due to surveying. 2. The trapezoidal and prismoidal formulae were derived based on the assumption that end sections are in parallel planes.

### What is the mid section formula?

From the mean-depth the area of mid-section is to be worked out and volume of arthwork to be compted by multiplying the area of mid-secion by the distance between the two original sections.

**Why Prismoidal correction is necessary?**

The value of the equidistant position of the prisms must be known for further continuation problem. Explanation: Prismoidal correction can be given as the difference between the volume calculated and that obtained from the prismoid formula. The obtained correction is always subtractive.

**How do you calculate Canal quantity?**

- CIVIL ENGINEERING SECTION.
- There may be three types of canal sections:
- d.
- GL.
- The E/W can be calculated exactly as in the case of roads and.
- The E/W in excavation (digging) and E/W in filling (banking)
- Width of permanent land (W) = B + (b1+b2) + 2s1H +2s2h + E.

## What is the mid sectional area method?

First by avergaing the depths of two consecutive sections. From the mean-depth the area of mid-section is to be worked out and volume of arthwork to be compted by multiplying the area of mid-secion by the distance between the two original sections.