The Roof of a Building Is in the Shape of the Hyperbola

Multiple Choice

The roof of a building is in the shape of the hyperbola $y ^ { 2 } - x ^ { 2 } = 58$ , where $x$ and $y$ are in meters. Determine the distance, w, between the outside walls.
$$A = 12 m$$

A) 9.25 m
B) 18.5 m
C) 86 m
D) 14.2 m