Help urgent gre in 2 days

Taylor located on level ground is in the shape of a square regton with two adjoining semcrcule regions whose diameters are two opposite sides of the square. The radius of each semicircle is 10 meters. The garden will be surrounded along its edge by a dewalk with a uniform width of 1.5 meters. Approximately what will be the area of the sidewalk, in square meters?
70
80
130
140
160

I am getting correct answers by both of these diagrams, which one is correct?

How did you get 160 in the second diagram? It is an oval and oval areas are not tested in the GRE. Neither will GRE have questions that can have two different answers. So they will either provide a diagram or the question will be unequivocally worded.