I overheard one pupil tell another yesterday morning that: “The air in a cylinder that contained the Eiffel Tower would weigh more than the Eiffel Tower itself.” It sounded feasible, but I wanted to check the maths. The metal structure of the Eiffel Tower has a mass of 7300 tons, or 7.3 million kilograms. The design of … Continue reading An interesting fact about the Eiffel Tower