A car leaves Nagpur at 8 a.m. and travels at 60 km/h. A second car leaves the same point at 10 a.m. along the same road at 80 km/h. How many hours after 8 a.m. does the second car catch up with the first?

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Accepted Answer

8. By 10 a.m. the first car is 2 × 60 = 120 km ahead. The gap closes at 80 − 60 = 20 km/h, so it takes 120/20 = 6 hours after 10 a.m., i.e. 8 hours after 8 a.m. (at 4 p.m.).

A car leaves Nagpur at 8 a.m. and travels at 60 km/h. A second car leaves the same point at 10 a.m. along the same road at 80 km/h. How many hours after 8 a.m. does the second car catch up with the first?

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