# C# Program to Calculate Area and Volume of a Cone

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This is a C# Program to calculate area and volume of a cone.

Problem Description

This C# Program Calculates Area and Volume of a Cone.

Problem Solution

Here radius and height of the cone is obtained from the user and the surface area and its volume its calculated.

Program/Source Code

Here is source code of the C# Program to Calculate Area and Volume of a Cone. The C# program is successfully compiled and executed with Microsoft Visual Studio. The program output is also shown below.

```/*
* C# Program to Calculate Area and Volume of a Cone
*/
using System;
using System.IO;
class program
{
public static void Main()
{
double r, h, surface_area, volume;
double PI = 3.14;
Console.WriteLine("Enter the Radius and Height of a cone : ");
surface_area = PI * r * (r + Math.Sqrt(r * r + h * h));
volume = (1.0 / 3) * PI * r * r * h;
Console.WriteLine("Surface Area of cone is : {0} ", surface_area);
Console.WriteLine("Volume of Cone is : {0}", volume);
}
}```
Program Explanation

In this C# program, library function defined in <math.h> header file is used. We are reading the radius and height of a cone using ‘r’ and ‘h’ variable respectively. To compute the area and volume of a triangle the formula are used

Surface_area = 2 * Pi * r * (r + h),

Volume = Pi * r * r * h

Where Pi = 22/7.

Runtime Test Cases
```
Enter the Radius and Height of a cone : 3 3
Surface Area of cone is : 68.2256752726637
Volume of Cone is : 28.26```

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