Çàäà÷à . 16

public abstract class Solid
{
 private String name;
//constructor
 public Solid(String solidName)
 { name = solidName; }
 public String getName()
 { return name; }
 public abstract double volume();
}
public class Sphere : Solid
{
 private double radius;
//constructor
 public Sphere(String sphereName, double sphereRadius) : base(sphereName)
 {
  radius = sphereRadius;
 }
 public override double volume()
 { return (4.0/3.0) * Math.PI * radius * radius * radius; }
}
public class RectangularPrism : Solid
{
 private double length;
 private double width;
 private double height;
//constructor
 public RectangularPrism(String prismName, double l, double w, double h) :  base(prismName)
 {
 length = l;
 width = w;
 height = h;
 }
 public override double volume()
 { return length * width * height; }
}