Average speed

What is the average speed you have to move the way around the world in 80 days? (Path along the equator, round to km/h).

Correct result:

v =  21 km/h

Solution:

t=80 24=1920 r=6371 s=2π r=2 3.1416 637140030.1736 v=s/t=40030.1736/1920=21 km/h



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