The length of fence that Mr johnson had is 24.6m.
A rectangle's perimeter would be the total length and distance of all its boundaries on all sides. A perimeter of rectangle would be a linear measurement that is expressed in meters, feet, inch, or yards.
A rectangle's perimeter is the whole length of its outside boundary. It is equal to twice the sum of its length and breadth and is computed to use the formula:
Perimeter = 2(length + width).
Now according to the question;
Let 'L' be the length of the rectangle garden = 7m.
Let 'B' be the breadth of the rectangle garden = 7m.
Using the formula;
Perimeter = 2(length + width).
Substitute the values;
Perimeter = 2(7 + 7).
Perimeter = 28m
Mr johnson needed an extra of 3.4 m of fence.
The original length of the fence is
= 28m - 3.4m
= 24.6m.
Therefore, The length of fence that Mr johnson had is 24.6m.
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