Aptitude - Problems on Trains - Discussion

You all converted km --> m. Why don't you convert seconds into hours?

Then S=d/t,
Then D=s*t.
But t=9 sec.

If we convert it into hours form we will get 1/400.
Then d=60*1/400.

Is it correct method. Let me explain in this way guys.

Thank you for all your answers.

Thanks for explanation.

@Sundar, @Kalimuthu & @Sungathan.

Really great explanation. Thank you all for your explanations.

Well explained, Thanks @Sundar.

I agree @Pradeep.

Really great explanation of the solution. Thank you all.

I easily understand the conversion. Thanks for the given explanations.

If you divide 1000/3600 = 0.27.

But it is showing 10/36 after that 5/18.

I am not understanding how it came 10/36 then 5/18?

Please help me by explaining it.

Many time we need to change speed from km/h to mtr/sec or mtr/sec to km/h. In the question, to change a speed from km/h to mtr/sec you have to multiply with 1000 and divide with 3600 and then u get speed in mtr/sec. For eg 90km/hr in mtr/sec?

We need to do 90*1000/3600 and u ll get 25m/s. because we do this mainly on every question. so we prepare ourselves in advance by cutting these two cake to serve immediately. Again same eg. 90k/h to m/s.
90 * 5/18 = 25 m/s.

And yes if we want to change m/s to k/h just multiply with 18/5 and you'll get your speed.
Eg. 25m/s to k/h ----25 * 18/5 = 90 k/h.