Multiple choice

A train of 120 m long passes a post in 8 seconds. The speed of the train is

  1. $45 km/hr$
  2. $54 km/hr$
  3. $36 km/hr$
  4. $30 km/hr$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = Distance/Time. The train covers 120 m in 8 seconds, so speed = 120/8 = 15 m/s. Converting to km/hr: 15 × (3600/1000) = 15 × 3.6 = 54 km/hr. The train's length is the distance it covers when passing a fixed point.

Keep practicing — related questions