Final answer:
The distance traveled by the car is calculated by multiplying the average speed of 20km/h by the time of 0.5 hours, resulting in a distance of 10 kilometers.
Step-by-step explanation:
When a car travels for a certain duration at a specific average velocity, it covers a certain distance. In this case, the car travels for 30 minutes (0.5 hours) at an average velocity of 20 kilometers per hour (km/h). To find the distance traveled by the car, we can use the formula for distance, which is distance = velocity * time.
The velocity of the car is given in kilometers per hour (km/h), and we need to convert it to meters per second (m/s) to make it compatible with the formula for distance. To do this, we can use the following conversion:
1 kilometer = 1000 meters
1 hour = 3600 seconds
Using these conversions, we can calculate the speed of the car in meters per second as follows:
20 km/h = 20000 m/3600 s = 5.56 m/s
Now that we have converted the velocity to meters per second, we can use it in the formula for distance:
distance = velocity * time
distance = 5.56 m/s * 30 minutes * 60 seconds/minute = 1103.6 meters (m)
Therefore, when the car travels for 30 minutes at an average velocity of 20 km/h, it covers a distance of approximately 11.04 kilometers (km) or 11,036 meters (m).