Final answer:
To find the total number of kilometers the student drives each workday, we calculate the average speed using the provided information. Therefore, the total number of kilometers that she drives each workday is 40 km.
Step-by-step explanation:
To calculate the total number of kilometers that the student drives each workday, we need to determine the average distance driven. We can use the information provided in the question to solve this.
In the given information, we have the total distance traveled (12.0 km), and the time taken (18.0 min). To find the average speed, we divide the distance by the time:
Average Speed (A) = Distance / Time
Converting the time from minutes to hours:
Average Speed (A) = 12.0 km / (18.0 min / 60)
Average Speed (A) = 12.0 km / 0.3 h
Average Speed (A) = 40 km/h
Therefore, the total number of kilometers that she drives each workday is 40 km.