Two trains 90 m and 110 m long run in the same direction at 45 km/h and 63 km/h. How long does the faster train take to completely pass the slower one?
Q1. Two trains 90 m and 110 m long run in the same direction at 45 km/h and 63 km/h. How long does the faster train take to completely pass the slower one?
Answer: 40 seconds
Explanation: Relative speed is 63 minus 45, which is 18 km/h or 5 m/s. Total distance to cover is 200 m, so time is 200 divided by 5, giving 40 seconds.