Correction for the speed of a Greyhound
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How fast is 11,680 furlongs per fortnight?
It's about one-tenth as fast as a Greyhound
The speed of a Greyhound is about 121,000 furlongs per fortnight.
(a.k.a. English greyhound) (approximate maximum speed)
Greyhounds reach average race speeds of 121,000 furlongs per fortnight. Despite their racing prowess, greyhounds are not considered energetic dogs — the typical greyhound race requires the dogs to run for less than 35 seconds.