Hmm... Seems like a role-play is on order:
XXX - At what speed can I legally travel down the freeway?
Others - 110km/h
GG - No no no, that's just what the car speedo is saying. What you need to do is take into consideration the rotational velocity of the engine's crank shaft, then multiply that by the respective gear ratio (which is dependant on many things, such as which gear is selected, and if it's an auto box a factor for slippage must also be applied), then multiplied by the diff ratio. Finally you must calculate the car's tyre radius (which of course will vary depending on tyre pressure, load on the tyre, tyre temperature and tread level) and multiply that by the rotational speed of the axle, thus giving you a speed roughly equivalent to the calibrated speed shown on the speedo. The two are unrelated.
Others -
Both technically correct, only one answers the
question that was asked...