Aptitude - Problems on Trains - Discussion

Here it states to cross the driver, not cross the train.

So, please explain in detail.

Can someone explain why they reversed the distance in the final calculation (i.e 125/6 to 6/125)?

What length we should consider if it is asked for faster train?

@All.

We use the length of the slower train because the problem is asking about the time it takes for the entire slower train to pass by the driver of the faster train. The calculation considers the time for the slower train to completely pass a single point (the driver), which depends on the train's full length.

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!

The correct answer is 48 sec.

@All.

Answer is incorrect. It should be 48 instead of 24. If the given answer is correct then look at question number 9 the same question with different value then q. 9 is incorrect.

@All.

This is right because of the length of the man, pole etc is negligible, here asked only driver cross.

In the same question, Find the time taken by the faster train to pass the driver of the slower train one so whats the answer?

How to convert into min? Please tell me.