Width (W) = w
Length (L) = 2w + 6
Perimeter = 228
2 (L + W) = 228
L + W = [tex] \frac{228}{2} [/tex]
L + W = 114
2w + 6 + w = 114
3w = 114 - 6
3w = 108
w = [tex] \frac{108}{3} [/tex]
w = 36
Hence, width is 36 ft and length is (2*36 + 6 = 72 + 6) 78 ft.