I believe the answer is 24 times
hope this helps!
10=1+9 1x9=9
=2+8 2x8=16
=3+7 3x7=21
=4+6 4x6=24
=5+5 5x5=25
↑ Left: the possible measurements of the two fences, Right: the possible areas
out of the areas calculated, 25 sq feet is the maximum. :)
Ans: 25 square feet
The second in the top row is this:
42.4-1.5(TIMES)3.1
42.4-46.5
-4.1