How long does it take to walk up 20 flights of stairs?

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Tags

1. #areas
2. #speed
3. #while
4. #minutes
5. #finish
6. #spent
7. #going
8. #depends
9. #level
10. #stairs
11. #participant
12. #amount
13. #average
14. #little
15. #flights
16. #racers
17. #fitness