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.
- 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.
- oubaasLv 78 months ago
t = d/(V1+V2) = 25/(10+15) = 1.00 hours
- conley39Lv 78 months ago
1 hour. The first car covers 10km and the second 15 km for a total of 25 km.
- JimLv 78 months ago
25 km (1 hour/25km) = 1 hour