Everyone on Earth says “hello” one after another, one second each. How many years does it take?

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The answer

260 years

About 260 years. The first ones would be long gone.

How to get there

1. 8.2 billion seconds
2. ÷ 31.6 million seconds per year
3. = about 260 years

Source: Calculation with 8.2 billion people (UN 2024)

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