Javier has 3 math books that are the same size. he makes a stack by placing the books on top of each other. the total stack is 10 inches what is the height of one book as a fraction?

The height of one book is  in

Explanation:
We know that the 3 books are of the same size. This means that the 3 books have the same height.
Assume that each book has a height x in

Now, we know that the total height is 10 in.
Therefore:
x + x + x = 10
3x = 10
x = 10/3 in

Based on the above, the height of one book is 10/3 in

Hope this helps :)