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Estimation question

You walk around the Earth, 8 hours a day at 5 km/h. How many days does it take?

How close can you get? Make your own guess and earn points before you look at the answer.

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Show the answer and the reasoning

The answer

1,000 days

About 1,000 days. Almost three years of walking.

How to get there

  1. 8 h × 5 km/h = 40 km a day
  2. 40,075 km ÷ 40 km
  3. = about 1,000 days

Source: Calculation with 40,075 km at the equator

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