Brainteaser iconBrainteaser - Building Project

Building Project
Famous builders Gustave Eiffel, Isambard Kingdom Brunel, and Frank Lloyd Wright are collaborating on a special project. Eiffel can complete the project on his own in 120 minutes, while Brunel can do it in 100 minutes. They begin working together, and after 40 minutes, Wright joins them. The trio finishes the project 10 minutes after Wright's arrival. How long would it take Wright to complete this project on his own?