# How to find Volume and Surface Area of a Sphere using C#?

For volume and surface area of a sphere, firstly declare a variable with the value of radius.

int r = 15;

Get the volume f the sphere.

// calculating volume of sphere
cal_volume = (4.0 / 3) * (22 / 7) * r * r * r;

Now the surface area of the sphere is calculated −

cal_area = 4 * (22 / 7) * r * r;

Let us see the complete code −

## Example

Live Demo

using System;
using System.Collections.Generic;

public class Demo {
public static void Main(string[] args) {
double cal_area, cal_volume, r;
r = 15;

// calculating area of sphere
cal_area = 4 * (22 / 7) * r * r;

// calculating volume of sphere
cal_volume = (4.0 / 3) * (22 / 7) * r * r * r;

Console.WriteLine("Area of Sphere: " + cal_area);
Console.WriteLine("Volume of Sphere: " + cal_volume);
}
}

## Output

Area of Sphere: 2700
Volume of Sphere: 13500
Samual Sam

Learning faster. Every day.