How many years in total does a person who reaches 80 spend asleep?

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The answer

26.7 years

About 27 years. A third of a life.

How to get there

1. 8 of 24 hours = one third
2. 80 years ÷ 3
3. = about 26.7 years

Source: Calculation with 8 hours of sleep a night

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