Question

note the reading of odometer of your vehicle travel an appreciable distance in your city from one place to another note the final reading. find the distance and note the time and find the average speed

Answer 1

heya frnd 

suppose odometer is at 0 km

now lets start journey 

in this journey suppose u travelled from X TO Y 

let reading in odometer be M

Here, we have reading as M km, so the displacement will also be M km. 
Distance, the reading of the odometer initially set, that is, 0 km.
So, distance also is M km.