Create a base class named rectangle that contains lenght and width data members.

Form this class derive a class named Box having an additional data member named depth. The function members of the base rectangle class should consist of a constructor and an area function.

The derived box class should have a constructor, a voulume function, and an override function named area that returns the surface area of the box.

class Rectangle:

def __init__ (self, length, width):

self. length = length

self. width = width

def area (self):

area = self. length*self. width

return area

class Box (Rectangle):

def __init__ (self, length, width, height):

super ().__init__ (length, width)

self. height = height

def volume (self):

volume = self. length * self. width * self. height

return volume

def area (self):

area = 2 * (self. length*self. width) + 2 * (self. length*self. height) + 2 * (self. width*self. height)

return area

rec_1 = Rectangle (2,4)

box_1 = Box (2,2,6)

print (box_1. length)

print (box_1. area ())

print (rec_1. length)

print (rec_1. area ())

Explanation:

The programming language used is python.

class Rectangle

The class Rectangle is created with attributes length and width.

The class attributes are initialized using the __init__ constructor.

In the rectangle class, a method/function is declared to return the area of the rectangle.

class Box

This class is a child of rectangle and it inherits all its attributes and methods,

It has an additional attribute of depth and its constructor is used to initialize it.

The class contains a volume function, that returns the volume and an override function 'area () ' that displaces the area from the parent class.

Finally, some instances of both classes are created.