Aptitude - Problems on Trains - Discussion

Discussion Forum : Problems on Trains - General Questions (Q.No. 1)

Problems on Trains

A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

120 metres

180 metres

324 metres

150 metres

Answer: Option

Explanation:

Speed =		60 x	5	m/sec	=		50	m/sec.
			18				3

Length of the train = (Speed x Time).

Length of the train =		50	x 9	m = 150 m.
		3

Discussion:

586 comments Page 57 of 59.

Sathiyan js said: 4 years ago

Thanks all for clearing my doubts.

Rashmi said: 4 years ago

60km = 1hr
60km = 60min
so 1km = 1min.

1km = 1000metres, 1min=60sec
then 1000 = 60 sec
cancelation,

For 100=6,
50=3,
150=9,
Here 9 sec 150 metres.

Rajneesh singh said: 4 years ago

125/10 * 18/5 + 5 = 50km/hr.

Mitali said: 4 years ago

Thanks, everyone for explaining.

Sparsh said: 4 years ago

I thought the timelapse is started when the front portion of the train just comes in contact with the bridge. If that were the case then the total length covered in 30 seconds is the length of the train twice plus the length of the bridge. So, the answer comes to be 115m.

Deepak said: 4 years ago

Thanks everyone.

ALI AZAM said: 4 years ago

60km/hr convert into meters = 60*5/18 = 16.66 meter/sec.
This is for 1 second = 16.66 meter.
For 9 seconds just multiply by 9 = 16.66 * 9 = 150meter.
We already know that 1km/hr = 5/18meter/second.
1 meter/second = 18/5 km/hr.

Nishad Peta said: 4 years ago

Very excellent explanation and very useful link.

Thank you so much.

NiharAslam said: 4 years ago

Nice, Thnks everyone.

Amudeeswari said: 4 years ago

Thanks for all your answers. It helps me a lot to understand.

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