How long to drive 30 km?

The time it takes to drive 30 km depends on the speed at which you are traveling. If you are driving at a constant speed of 60 km/h, it would take 30 minutes to cover the 30 km distance. However, if you are driving at a slower speed of 30 km/h, it would take an hour to cover the same distance. Ultimately, the time it takes to drive 30 km is inversely proportional to the speed at which you are traveling.