Aptitude - Problems on Trains - Discussion

Thanks everyone for explaining.

Thank you everyone for explaining the answer.

Thanks all for explaining the answer.

Thanks all.

Thanks for the explanations.

Speed = distance/time taken.
60 *1000 = length/ 9/3600.

1 hr = 3600 seconds.
9/3600*60*1000 = 150 m.

According to antenna, which we design we say that frequency is between 1 to 5 Mhz or other think we can define values between 1 to 2 Mhz and can use them for infinite frequencies because if we consider frequency between 1 to 2 MHz then if we see then the output can be
1.1,1.111,1.115677,1.9876,1.11153565.....infinity now. Then why we are using this is because if you increase the value before a point it will have a large change as compared to adding values after the point.

And this is because even if there is a small change in frequency then both signals are uncorrelated to large extent.

There for 9seconds convert into hours.
60km convert into meters.
9/3600 * 60000 = 150.

Thank you all for explaining very well.

60km is converted to 60000m and 1 hour to 3600sec, there for 60000/3600 answer to 16.66 and multiple to 9sec and answer is 149.999.

So, here, the full value as 150 metres.