A train passes the platform in 18 seconds and a man standing on the platform in 8 seconds. If the length of the train is 100 metres. Find the length of the platform.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 125 m
A train crosses a man in 8 seconds it means a train covers its own length in 8 seconds
⇒ Distance = Speed × Time
⇒ 100 = S × 8
⇒ Speed of train = 100/8 = 12.5 m/s
In second case a train passes the platform in 18 seconds it means train covers distance of platform + distance of its length in 18 seconds
Let X be the length of platform
⇒ 100 + x = 12.5 × 18
⇒ 100 + x = 225
⇒ X = 225 - 100 = 125 m