Nth Floor Problem

Riddle: There is a building. The fifth floor is the top floor. The height of each floor is 2.5 meters. How tall is the building. (Assuming the ceiling of the top floor is the highest point of the building)

Answer: It depends. The first floor in UK is the second floor in US. Source: https://www.riddles.com/3440

There is a building. The fifth floor is the top floor. The height of each floor is 2.5 meters. How tall is the building. (Assuming the ceiling of the top floor is the highest point of the building) — Nth Floor Problem by Tony Timmy Tran Riddle