Civil Service Exam Reviewer · Word Problems · hard
A delivery van traveled 190 km in 5 hours. Part of the trip was at 30 km/h and the rest at 50 km/h. How many hours did it travel at 30 km/h?
- 3 hours
- 2 hours
- 2.5 hours
- 3.17 hours
Answer
A. 3 hours
Solution
30t + 50(5 − t) = 190 → -20t = -60 → t = 3 hours.
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