Hello..! :)
We first apply the data to the problem.
Data:
Then, we apply the formula that is.
Formula:
Finally we develop the problem.
Developing:
T = 10 km / 80 km/h
T = 0.125h
T = 7.5min
The vehicle takes a time of 0.125 hours or 7.5 minutes.
¿Doubts? On the comments. Greetings :D