Rectangular plot with sides 12.3 m 35.7 m fenced with a fence determine the length of the fence.

The length of the fence is the perimeter of this site.
In order to find the perimeter, it is necessary to determine the sum of all sides of the plot or find the double value of the sum of the two indicated sides.
As a result, we get:
P = 2 * (12.3 + 35.7) = 2 * 48 = 96 m.
P = 12.3 + 12.3 + 35.7 + 35.7 = 24.6 + 71.4 = 96 m.
Answer: the length of the fence is 96 m.