Respuesta :

A stack represents its data using the principle of LIFO on its width and height

There are 20 boxes in the stack

How to calculate the number of boxes?

The given parameters are:

Width = 4

Height = 5

The number of box (n) is calculated using

n = Width * Height

So, we have:

n = 4 * 5

Evaluate the product

n = 20

Hence, there are 20 boxes in the stack

Read more about stack at:

https://brainly.com/question/1601539