Multiple choice

In what time will a train 100 meter long cross an electric pole, if its speed be 144 km/hour?.

  1. 2.5 seconds

  2. 5 seconds

  3. 12.5 seconds

  4. 3 seconds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Speed = 144 km/h = 144 * (5/18) m/s = 40 m/s. Time = Distance / Speed = 100 / 40 = 2.5 seconds.

AI explanation

Convert the speed of 144 km/hour to m/s by multiplying by 5/18, which results in 40 m/s. To cross an electric pole, the train only needs to cover its own length, which is 100 m. Using the formula time equals distance divided by speed, divide 100 by 40 to get a time of 2.5 seconds.

Keep practicing — related questions