Given :
length = 28
width = 18
Shape of garden is:
So the perimeter of garden is:
[tex]=\text{length of rectangle +width+length+perimeter of half circle}[/tex]for half circle :
[tex]\text{perimeter of circle =}2\pi r[/tex]so
[tex]\begin{gathered} \text{perimeter of half circle =}\frac{2\pi r}{2} \\ =\pi r \end{gathered}[/tex]Radius of circle is half of width that is 9
[tex]\begin{gathered} =\pi r \\ =9\pi \\ =9\times3.14 \\ =28.26 \end{gathered}[/tex]So fence length of the garden is:
[tex]\begin{gathered} =28+18+28+28.26 \\ =102.26 \end{gathered}[/tex]