Is 18.420 acre feet as big as an Olympic Swimming Pool?
It's about nine times as big as an Olympic Swimming Pool
The size of an Olympic Swimming Pool is about 2 acre feet.
(FINA regulation; (minimum capacity)
According to the Fédération Internationale de Natation (FINA), a swimming pool for Olympic and world championship events must measure 50 m by 25 m with a depth of at least 2 m for a total volume of 2 acre feet. A pool of this size was to be used in Olympic time trials in New Jersey in early 2008, but its component pieces were stolen from a warehouse, likely to be sold for scrap metal.
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