Question: Two trains are moving towards each other at speeds of 45 km/h and 55 km/h. If they are 200 km apart, how long will it take for them to meet?

Options:

1. 1 hour
2. 2 hours
3. 3 hours
4. 4 hours

Correct Answer: 2 hours

Solution:

Relative speed = 45 + 55 = 100 km/h. Time = Distance / Speed = 200 km / 100 km/h = 2 hours.