Calculate the Length of the Train

Calculate the Length of the Train

A train is running at a speed of 30 km/hr and it crosses a post in 18 seconds. What is the length of the train?

A. 150 metres
B. 160 metres
C. 200 metres
D. 120 metres

Asked by: Saravanan on Mar 31, 2015.

2 Answers

Saravanan said: (Tue, Mar 31, 2015 12:00:00 AM IST)

Answer : Option A - 150 meters.


Speed of the train, v = 30 km/hr = 30000/3600 m/s = 300/36 m/s.
Time taken to cross, t = 18 s.
Distance Covered, d = vt = (300/36)*18 = 150 m.

Distance covered is equal to the length of the train = 150 m.

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Lokesh Gopale said: (Mon, Dec 10, 2018 12:58:51 AM IST)

What is the length of the post, if suppose the post length is increased then cross time also increases so how it is possible to vary the train length in same speed?

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