###### Exercise56

Each page of a book is $${5 {\textstyle\frac{5}{6}}}$$ inches in height, and consists of a header (a top margin), a footer (a bottom margin), and the middle part (the body). The header is $${{\frac{7}{9}}}$$ of an inch thick and the middle part is $${4 {\textstyle\frac{1}{9}}}$$ inches from top to bottom.

What is the thickness of the footer?

The footer is of an inch thick.

in-context