A train running at 72 km/h crosses a platform in 25 seconds. If the platform is 300 m long, what is the length of the train?
Show answer & explanation
Correct answer: A
Explanation
Speed of the train = 72 km/h = 72 × 5/18
= 20 m/s
Time taken to cross the platform = 25 seconds
Therefore, total distance covered in 25 seconds = 20 × 25 = 500 meters
Distance covered while crossing the platform = Length of the train + Length of the platform
500 = Length of the train + 300
Length of the train = 500 – 300 = 200 meters