Aptitude - Problems on Trains - Discussion

Hi, Chandana asked why don't we add the length of the train. Well this is a common doubt everybody gets .

Now you think, both are travelling in opposite direction.

Eg:

Train1 --------------> Fastest train

<---------------Train2. Slowest train

When this is the case the train1 and train2 travel with their respective speed. There will be no collision rigth because they travel in opposite direction. So we take only one length of the train that too the train we respect to .ie here we take the slower train which is 500 mts length.

Hope you got it. Have a nice day!

Both trains driver meet first then time started not before meeting

E.g

Train 1.----------> Fastest train
Train 2.       <------------ Slowest train.

If they go in the way adityabala said they will never meet. So both trains driver meet when time is ZERO or they never meet.

If it is 24sec, then time taken by faster train will be also 24.

But how is it possible that both are same. Not getting.

I agree with Pinku. If this is the way to find for slower train then what if the question is asked for faster train.

Even that will come as 24sec.

Then whats the use of asking slower and faster train in question?

OR is there any other method for it?

Its a simple brain teasing question.

Here they have asked only the time taken by the slower train to pass the driver of the faster train and not the length of the entire faster train.
So here we need to consider only the length of the slower train ie.500.
So,
Time=500\(75*5/18)
Which is 24sec.

Its given that they are running in opposite directions and parallel to each other. And answer is given when they are running in same directions.

Here length of both the trains moving opposite are same. The slower train first come across the driver of fast train. And then slow train cover its own distance to cross the driver. Now the slow train still has to cross the entire fast train.

That's why in this question we take distance as 500m i.e. length of slow train itself.

Consider the driver as a pole is best one method to understand this Question. Answer is right.

I accept @Durgesh, because he said well.

Faster train driver can be considered as an object like standing pole on station, slower train to pass a faster train driver is 500/75*5/18.