Multiple choice

A train 150 metres long is runningat a speed of 54 km/h. How much timewill it take to cross a signal post?

  1. A.8S

  2. B.10S

  3. C.12S

  4. D.15S

  5. E.11S
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = 54 km/h = 54 * (5/18) m/s = 15 m/s. Time = Distance / Speed = 150 m / 15 m/s = 10 seconds.

AI explanation

Convert the speed of 54 km/h to metres per second using the standard 5/18 conversion factor to get 15 m/s. Apply the formula time equals distance divided by speed, placing the train length of 150 m in the numerator. This calculation results in a time of 10 seconds.

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