Then 2 16=x(24-x/2)
Then 24x-x 2/2 = 2 16.
Then (x-24) 2 = 144.
X-24= 12。
Then x=36.
Then 24-x/2=6.
36 is greater than 30
Choose 30 meters as the wall.
30x=2 16
X = 7.2m。
Then the fence used 2x7.2+30-1= 43.4m..
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