509
xkcd #3248: 182.8 Meters
(thelemmy.club)
Title text:
They rounded down to 182.8 instead of rounding up to 182.9 because 182.9 might make the statement incorrect.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3248/
Do speedometers even measure such low speeds with anywhere near that precision?
Depends on the car. I'm sure you've got high end cars with micrometer accuracy.
Realistically, if you're driving in a parking lot you should never be looking at your speedometer. Kids, dogs, shopping carts and other hazards jump out with no warning.