Final answer:
To calculate average speed, divide the total distance by the total time taken. In this case, the average speed is 30.0 km/h.
Step-by-step explanation:
To calculate average speed, we divide the total distance traveled by the total time taken. In this case, you drove 10.0 km in 20.0 minutes. To convert minutes to hours, we divide by 60. The average speed in kilometers per hour is calculated as:
Average speed = Total distance / Total time = 10.0 km / (20.0 min / 60 min/h) = 30.0 km/h