Question 948922
Width: x
Length: 5 + x

Now, plug in and solve:

94 = 2(5+x) + 2(x)
94 = 10 + 2x + 2x
94 = 10 + 4x
84 = 4x
21 = x

Width: 21m
Length: 26m

So, the second one from your choices.