Robert is visiting his friend who lives 170 kilometres away. it took him 2.5 hours to get to his friend's house. at what speed did he travel?

Here is the answer of the given problem above.
In order to get the speed, we need to use the formula s= d/t (Speed = distance over time). Given that the distance is 170 kilometers and the time is 2.5 hours, we divide 170 by 2.5 and we get 68. Therefore, the speed that he traveled is 68km/hr. Hope this answer helps. 

Oh i'm sorry. didn't see the options