You can
put this solution on YOUR website!The largest area is given by a square design
let us analyse
perimeter is 24
each side 6ft
we can have width 1 length 11 area 11
width 2 length 10 area 20
3 lenght 9 area 27
4 length 8 area 32
5 lenght 7 area 35
6 lenght 6 area 36
we do not need to go further as width 5 lenght 7 will be above also