Civil Service Exam Reviewer · Word Problems · hard
Tess leaves a town driving at 50 km/h. 1 hour(s) later, Ben leaves the same town on the same road at 70 km/h. How long after Ben starts will Ben catch up?
- 3 hours and 30 minutes
- 43 minutes
- 2 hours
- 2 hours and 30 minutes
Answer
D. 2 hours and 30 minutes
Solution
Head start = 50 × 1 = 50 km. Gap closes at 70 − 50 = 20 km/h. Time = 50 ÷ 20 = 2 hours and 30 minutes.
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