Answer:
114 m.
Step-by-step explanation:
The perimeter of the whole pond = 2*21 + 2*12
= 66m.
The length of the sides of each square pond = 12 - 2(3) = 6 m.
So the perimeter of the 2 ponds is 2 * 4 * 6 = 48 m.
The total perimeter of the area planted with flowers = 66 + 48
= 114 m (answer).
