use of Super Keyword

class Box
{
double width;
double height;
double depth;

 Box(Box ob)
 {
  width=ob.width;
  height=ob.width;
  depth=ob.depth;
 }

 Box(double w, double h,double d)
 {
  width=w;
  height=h;
  depth=d;
 }
  Box(double d)
  {
  width=d;
  height=d;
  depth=d;

  }

 void volume()
 {

 System.out.println("\n the volume is " +width*height*depth);
 }
}

class B extends Box
{
double weight;
 B(double a,double b,double c, double d)
 {
 super(a,b,c);
 weight=d;
 }
  void show()
  {
 System.out.println("\n Weight is "+weight);
  }


}

class C
{
public static void main(String args[])
{
B ob=new B(5,6,10,4);
 ob.volume();
 ob.show();
}

}