Answer:
 

Explanation:
Justin wants to use 188 ft of fencing to fence off the greatest possible rectangular area for a garden.
So, perimeter = 188 ft
The greatest possible rectangular area is square.
So, Perimeter of square = 

So, 

 

 

Thus the side of the square is 47 m
Thus the dimension of greatest possible rectangular area = 

Area of garden = 

 = 

Hence the area of the garden is 
