Aptitude - Problems on Trains - Discussion

Here we have to think that they are asking the length of train.
First we have conform that all the values given are same format or not .
if not we have to convert them into one format depending on the answers given to us.
Then it is possible to get the correct answer.

The first answer explanation by Sundar is very good .

First convert the km into metres 60km will bcome 60000 metres then divide 60000 with 1 hour that is 60,60000/60 this will give us the speed of the train in mins n then 1000 with 60(to convert the speed in seconds)then multiply the ans with 9 seconds.ie 16.66*9 will give us 150 :)

Hi i am palanivel i got ur explanation for above question..thak you..

Hi Kalimuthu great explanation.

I'M UNDERSTAND SIR BUT I'm suppose to be confusing to seeing above following questions so I'm kindly requesting you to explain the solutions above question, thank you.

(sqrt(3N))^3/2 = 90

How to find N value from this problem?

From the question we can predict speed= distance/hour
((by speed=60 km/hr)note the km/hr)
As to calculate for 9 sec I am converting the whole things to seconds
(i.e.)speed=60000/3600=16.666666(remember this is for one second)

therefore for 9 seconds
16.666666*9= 150

@Contactjerin

Feet to Meter conversion: 1 feet = 0.3048 meter
Meter to Feet conversion: 1 meter = 3.28083 feet

This is what I mentioned already in this discussion.

You can easily find the answer for your question that is:

3.28083 feet = 1 meter.

Any one know the how many feet is one meter?

Let length of the train be 'x' metres...
Speed of the train = 60km/hr(given)
Time = 9seconds(given)

refer the formulas for train problems...

As the time is given in seconds and answers are given in metre(train length) we are in need to convert from km/hr to m/s
km/hr = 1000m/(60min*60sec) = 5/18 m/s

Length of the train(distance covered a post)= speed * time
= (60*(5/18))*9
= (50/3)*9
= 150 m

For the train related formulas,check the READ MORE in Left corner(Important formulas)...