We know, Perimeter, P = 2 (l + w)
Here, width = w
Length = 2w + 7
Substitute their values,
110 = 2(2w + 7 + w)
110 = 2(3w + 7)
110 = 6w + 14
6w = 110 - 14
w = 96/6
w = 16
Length = 2w+7 = 2(16) + 7 = 39
In short, Your Answer would be 39 in
Hope this helps!