This qusetion was about a journey between two towns. During the start of the journey the odometer reads 39593 ( the reverse of the no is also the same) and at the end of the journey again the odometer reads a number similar to prior one….If the max speed is 90km/hr during the journey. what will be the avg speed thruout the journey?

Answer 1

Checking for palindromic numbers greater than 39593, we find:

39693
39793
39893
39993
40004
40104
...

If we pick, say, 40004, the trip distance is 411 km.

Now we're stuck. We have no idea of how the speed changed. Did they drive at 40km/hr for most of the trip, and speed up to 90 at the end, or did they drive at 90km/hr for all of the trip?

As you can see, further info is needed.