The section of the building can be described by the following function:
 – b is the half-span (6,00 m),
 – h is the apex-height (7,00 m).

1. Display the section.
2. Find the location of its intersection with the following curve: (b²/6 + (x + h/6)²)^½.

A possible solution using VBA |↷|      

A possible solution using Solver also |↷|