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Pop. of Ethiopia (108.4million) is 25 x Pop. of Dar es Salaam, Tanzania (4.37 million people)
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Height of a tennis net at the centre (914 mm)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.