Answer: 310 ft
Explanation:
The image does not show clearly the dimensions. However, let's answer assuming the dimensions are 44ft, 200 ft, 44 ft and 310 ft.
If both trapeze are congruent, this means both are equal in dimensions and angles. Hence ABCD=EFGH and:
AB=EF=44 ft
DC=HG=44 ft
BC=FG=200 ft
AD=EH=310 ft