A truck driver drove 225 miles at an average speed of 50 miles per hour and another 210 miles at an average speed of 60 miles per hour. What was the total driving time?

Rationale

It took the truck driver a total of 8 hours to complete the journey.

To find the total driving time, we need to calculate the time taken for each segment of the trip and then sum those times. The driver took 4.5 hours for the first segment (225 miles at 50 mph) and 3.5 hours for the second segment (210 miles at 60 mph), resulting in a total of 8 hours.

A (6 hours 30 minutes) YOUR ANSWER

This choice underestimates the total driving time. The first segment alone requires 4.5 hours, and the second segment adds another 3.5 hours, resulting in a total of 8 hours. Thus, this answer does not reflect the calculated total.

B (7 hours) YOUR ANSWER

This option also falls short of the actual driving time. While it may seem plausible for shorter trips, both segments cumulatively take 8 hours. Therefore, this answer is incorrect as it fails to account for the additional time required for the second leg of the journey.

C (7 hours 30 minutes) YOUR ANSWER

This choice still does not capture the full duration of the trip. With calculated times of 4.5 hours and 3.5 hours for the respective segments, the total reaches 8 hours. Thus, this option is incorrect as it does not encompass the entire driving time.

D (8 hours) CORRECT

This answer correctly represents the total driving time. The calculations show that the truck driver spent 4.5 hours on the first segment and 3.5 hours on the second, leading to an accurate total of 8 hours.

Conclusion

To find the total driving time for the truck driver, we calculated the time for each segment of the trip, which totaled 8 hours. This conclusion highlights the importance of accurate speed and distance calculations to determine overall travel time effectively. Options A, B, and C did not account for the full distances and speeds, thus leading to incorrect estimates.

A truck driver drove 225 miles at an average speed of 50 miles per hour and another 210 miles at an average speed of 60 miles per hour. What was the total driving time?

It took the truck driver a total of 8 hours to complete the journey.

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