A train 180 m long is running at 54 km/h. How long will it take to pass a signal pole?
Correct answer B. 12 seconds
Explanation
Speed = 54 × 5/18 = 15 m/s. To pass a pole the train covers its own length, so time = 180 / 15 = 12 seconds.
Answer checked How we write and check questions
Discussion