public class Cuboid extends ThreeDShape {
  Rectangle rec;
  int depth;
  
  public Cuboid( Rectangle rec, int depth) {
    this.rec = rec;
    this.depth = depth;
  }
  
  public double getVolume() {
    return rec.getArea() * depth;
  }
  
  public double getArea() {
    return 2 * ( depth * rec.getWidth() + depth * rec.getHeight() + rec.getArea() ); 
  }
  
  public String toString() {
    return rec.toString() + " ,depth: "+depth;
  }
}