If u are running at 10km/hr and anothet person is running st 20km/hr then in which round u both will be at same point

No matter what size track they run on, they will meet at the starting line every two laps.

With slower person's perspective, they will meet at starting point each round. Person running 10 km/hr, will complete one round, while the other person will complete two round during same time.

Yes, with reference to the slower runner, they'll meet every round and with reference to the faster runner, they'll meet every alternate round.

There is not enough infomation here. You really do need to know the length of the track to determine future meeting points.

every round for the slower runner.

at the end of second round (w.r.t to the person with 20km/hr speed).

From 20kmph perspective Every alternative round they will meet at starting point , From 10kmph perspective every round they will meet at starting point.

2nd round

You are assuming that the track is exactly 1KM in length. Most tracks are not that, what are they 440?

4 is wrong answer to this question. Its answer for next question. Posted here by mistake