A bike completes a round around the circle in 2 hr 20 min and the speed of the bike is 340 km/h. What is the average velocity of the bike?

First, convert the time into hours. 

2 hours and 20 minutes= (2 + 20/60) hours =2.333 hours.

The total displacement in this case is zero because the bike completes a round around the circle, which means it returns to its starting point. In such a case, the total displacement is zero.

Now, you can calculate the average velocity:

Average Velocity = Total Displacement / Total Time

Average Velocity = 0 km (zero displacement) / 2.333 hours = 0 km/h

So, the average velocity of the bike is 0 km/h because it returns to its starting point, resulting in zero displacement during the round.