Discuss Forum
1. A train went 300 miles from city X to city Y at an average speed of 80 mph. At what speed did it travel on the way back if its average speed for the whole trip was 100 mph?
- A. 120 mph
- B. 120 mph
- C. 120 mph
- D. 120 mph
Answer: Option C
Explanation:
Total time spent = (300 + 300) / 100 = 6 hours
Time spent on departure trip = 300 / 80 = 3.75 hours
Time spent on return trip = 6 - 3.75 = 2.25 hours
Average speed on return trip = 300 / 2.25 = 133.33 miles per hour.
Post your comments here: