Answer:
They have both laid a total of 54 feet of hedges
Step-by-step explanation:
Here, we have a square bordered by a rectangle
The dimensions of the rectangle is 12 ft by 6 ft
The dimensions of the square is same all through and since it shares the width with the rectangle;
The dimensions of the square will be 6 ft by 6 ft
So since they decided to lay each side with edges,
The total hedges laid will be;
6 + 6 + 6 + 6 + 12 + 12 + 6
5(6) + 2(12)
= 30 + 24 = 54 ft