# What is the formula for a 3D cone?

## What is the formula for a 3D cone?

The formula for the volume of a cone is V=1/3hπr².

## What is the CSA of frustum of cone?

The curved surface area (CSA) of the frustum of the cone is, CSA of frustum of cone = πl [ (R2 – r2) / r ] (OR) πL (R + r) We know that the base areas of the frustum of the cone are πR2 and πr2. Thus, the sum of base areas is π (R2 + r2).

What do you mean by frustum of cone?

In geometry, a frustum (plural: frusta or frustums) is the portion of a solid (normally a cone or pyramid) that lies between one or two parallel planes cutting it. A right frustum is a parallel truncation of a right pyramid or right cone.

What is the CSA of a cone?

The CSA of cone is equal to the product of radius of the circular base and slant height of the cone. The formula used to calculate the curved surface area of cone is as follows: Curved Surface Area (CSA) = πrl. Where r is the radius of the circular base and l is the slant height of the cone.

### What is the relation between r and L of a cone?

‘l’ denote the slant height of a cone. ‘h’ denote the height of a cone. ‘r’ denote the radius of base of a cone. as we know that height is perpendicular to the base of a cone so we can use Pythagorean theorem to find a relation between l,h and r.

### How do you calculate the CSA of a cone?

To find the curved surface area of any cone, multiply the base radius of the cone by pi. Now multiply your answer by the length of the side of the cone. If you want to total surface area remember to add on the area of the base of the cone.

What is the formula for the frustum of a cone?

What is the formula for frustum of a cone? The conical frustum formula of cone in terms of radius ‘r’ and height ‘h’ is given by; Slant height = √((r – r’) 2 + h 2 ) Volume = (1/3) x π x h x (r 2 + r’ 2 + (r x r’))

How to calculate the height of a slanted cone?

Slant height, L = √h 2 + (R-r) 2 Curved Surface area of cone = π (R + r) L. Total surface area of a frustum = Base area + Area of upper circle + Area of lateral surface = π (R 2 + r 2 + RL + rL). Volume of frustum = πh/3 (R 2 + r 2 + Rr) 1. The frustum of a right circular cone has base diameter 10 cm.

## How to calculate the volume of a cone?

The height of frustum is units and its slant height is units. Therefore, the volume of the frustum of cone can be given as: Hence, according to condition for similar triangles the ratio of corresponding sides must be equal: This gives the required volume of frustum of cone.

## How to calculate the surface area of a frustum?

The total surface area is given as the sum of curved surface area and the area of the base. Thus the total surface area of the frustum is: Total surface area of frustum of cone = \\(πL~(r~+~r’)~+~πr^2~+~πr’^2\\) Thus, the problems based on frustum of solids and cones can be easily solved. Learning is an unending journey.