a rectangular chicken yard was built against an existing she wall. 30m of fencing was used to enclose 108m^2, Find the dimesion of the Yard

1 answer

what are the factors of 108?

1 108
2 54
3 36
4 27
6 18
9 12

So, how can those be used to add up to 30? (Remember that one has to be used twice)