How many litres of saliva does a person make in 80 years?

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The answer

43,800 litres

About 44,000 litres. Almost 300 full bathtubs.

How to get there

1. 1.5 l × 365.25 × 80
2. = about 43,800 l

Source: Wikipedia: Saliva, about 1.5 l per day

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