Civil Service Exam Reviewer · Word Problems · hard
Jun leaves a town driving at 80 km/h. 2 hour(s) later, Bea leaves the same town on the same road at 90 km/h. How long after Bea starts will Bea catch up?
- 18 hours
- 1 hour and 47 minutes
- 16 hours
- 4 hours
Answer
C. 16 hours
Solution
Head start = 80 × 2 = 160 km. Gap closes at 90 − 80 = 10 km/h. Time = 160 ÷ 10 = 16 hours.
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