Answer
The speedometer of any vehicle measures speed, not velocity.
Work Step by Step
Speed is the ratio of distance moved by a body in unit time irrespective of direction but velocity the ratio of distance moved by a body in unit time in a specific direction.
Speed of a vehicle in a particular instant of time is called instantaneous speed.
The ratio of total distance moved by a vehicle to the time taken by the vehicle is called the average speed.
Speedometer measures the instantaneous speed but not average speed.
