# Two cars are approaching each other on a road, traveling in opposite directions at speeds of 10km/h and 15km/h.?

At a certain moment, the cars are 25 km apart from each other. How much time elapses from that moment until the cars pass each other.

### 4 Answers

Relevance

- Andrew SmithLv 78 months ago
The RELATIVE speed is 25 km/hr. ie whichever car you are in sees the other car approaching it at 25 km/hr.

The distance between them is 25 km

time = distance / speed = 25km/25 km/hr = 1 hr.

The earth is not relevant to this problem.

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- conley39Lv 78 months ago
1 hour. The first car covers 10km and the second 15 km for a total of 25 km.

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