Assertion: greyhound's stride | /r/CapableOf | travel at almost 20 metres per second
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text: The Greyhound can reach a full speed of 70 kilometres per hour (43 mph) within 30 metres (98 ft), or six strides from the boxes, traveling at almost 20 metres per second (66 ft/s) for the first 250 metres (820 ft) of a race.