How long is a length of a math book?

Answer 1

The length of a math book can be defined in two ways: the physical length of the book or the number of pages contained in the book.

In the first case, the length of the book would usually be considered the distance from the top edge to the bottom edge of the book and this would vary depending on the specific book you were considering.

In the second case, you could open the book to the last page and examine the final page number and use that as the number of pages.