<span>circumference = 60*PI cm
If an arc is 140 degrees of the circle then its length =
</span>
<span>60*PI cm * (140 / 360)
arc length = 23.33333 cm
</span>
        
                    
             
        
        
        
Answer is 7/12 I know it is because, well I just know it is 
        
             
        
        
        
Answer:



Step-by-step explanation:
Let
x----> the length of the rectangular garden
y---> the width of the rectangular garden
we know that
The perimeter of the rectangle is equal to

we have

so

simplify

 ------> equation A
------> equation A
Remember that the area of rectangle is equal to
 ----> equation B
 ----> equation B
substitute equation A in equation B
 
 
 ----> this is a vertical parabola open downward
----> this is a vertical parabola open downward
The vertex is a maximum
The y-coordinate of the vertex is the maximum area
The x-coordinate of the vertex is the length side of the rectangle that maximize the area
using a graphing tool
The vertex is the point 
see the attached figure
so

Find the value of y

The garden is a square
the area is equal to
 ----> is equal to the y-coordinate of the vertex is correct
 ----> is equal to the y-coordinate of the vertex is correct