Question

Basic difference between odometer and speedometer

Answer 1

One defines the speed at which one is traveling (speedometer) and the other counts miles traveled (odometer). An instrument provided in an automotive vehicle to indicate the total number of miles that have been traveled. ... 
Speedometer measures how fast something is going and odometer measures how far.

Answer 2

hi frnd here's your answer..
Odometer measures how miles or km travelled
Speedometer measures how fast something is going one (speed at which it travelling).
so it is the basic difference between odometer and Speedometer.

thq,hope it will be helpful for u