In a practical problem, if a car travels 60 km/h and a truck travels 40 km/h, how long will it take for both to meet if they start 200 km apart and travel towards each other?
Answer: B. 2 hours
The relative speed of the car and truck is 60 + 40 = 100 km/h. Time = Distance/Speed = 200 km / 100 km/h = 2 hours.