The rectangular garden plot is 86 m long and 9 m wide. Find the fence length of this plot.

In this task, we need to find the length of the fence that encloses the rectangular area. The fence is built along the perimeter of the site, which means that we need to find the perimeter of this rectangular area.
The perimeter of a rectangle is the sum of the length and width of the rectangle multiplied by 2. Let’s write the formula for the perimeter of a rectangle:
P = (a + b) × 2,
Substituting the known length and width of the site into the formula, we find its perimeter:
P = (86 + 9) × 2 = 95 × 2 = 190 m.
Answer: the length of the fence of the garden plot is 190 m.