Let's find what fraction 20 minutes is of one hour.
One hour= 60 minutes

So, 20 minutes is a third of one hour.
All we have to do is multiply 1/3 by 75 since we are not trying to find what the car travels in one hour, but in one third of an hour.

or 75÷3
25
So, the car travels 25 km in 20 minutes.
Now we need to convert km to meters.
1 km= 1000 meters
25 km=25,000 meters
So, the car travels 25,000 meters in 20 minutes.