C# Calculate Area and Volume of a Cone

using System;

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: ");
        r = Convert.ToDouble(Console.ReadLine());
        h = Convert.ToDouble(Console.ReadLine());

        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);

        Console.Read();
    }
}

 

Output