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Length overall of an `AC50` catamaran used in 2017 America`s cup (15 m) is about as big as Width of a typical Hot Air Balloon (15 m)
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Land used for agriculture in Rwanda (2011) (1,240 km^2)
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.