Discussion of Question with ID = 075 under Problems-on-Trains

This is the discussion forum for this question. If you find any mistakes in the solution, or if you have a better solution, then this is the right place to discuss. A healthy discussion helps all of us, so you are requested to be polite and soft, even if you disagree with the views of others. The question and its current solution has also been given on this page.



A train speeding at 18 km/h crosses the platform in 48seconds, but it takes 5 seconds to cross a man standing on the same platform. What is the length of the train platform?


215 meters.


216 meters.


214 meters.


217 meters.

Ans: a

The speed of the train in m/s is 18 × (5/18) = 5 m/s. The length of the train can be obtained from the time it takes to cross the man = $5 × 5$ = 25meters. The combined length of the train and platform can be obtained from the time it takes to cross the platform, = $5 × 48 = 240$ meters. Subtracting, we get the length of the train platform = 215 m.

Comments and Discussion