The farmer has a land divided into 10 sections
[tex]1section=2\frac{3}{4}\text{ acres}[/tex]Hence, the 10 sections will amount to;
[tex]\begin{gathered} 10\times2\frac{3}{4}=10\times\frac{11}{4} \\ =\frac{110}{4} \\ =\frac{55}{2} \\ =27\frac{1}{2}\text{ acres} \end{gathered}[/tex]Therefore, the acres of land the farmer owns as a mixed number in its simplest form is 27 1/2 acres.