Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 1)
1.
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
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:
587 comments Page 13 of 59.
SANTOSH KUMAR M said:
1 decade ago
I'll Give Simple Logic Answer.
i.e.,
WKT,
Speed = Distance/Time.
So,
The speed of the train is given 60km/hr.
Convert Train Speed In meters and hours into Seconds.
That is,(60*1000)/(60min*60sec).
i.e.,1 km=1000m.
1 Hour=60min.
1 min= 60sec.
We get 16.67m/s.
That is, the train traveled 16.67 meters in 1 second.
Then multiply 9 seconds with 16.67 meters.
Then length of the train traveled 150 meters in 9 seconds.
i.e.,
WKT,
Speed = Distance/Time.
So,
The speed of the train is given 60km/hr.
Convert Train Speed In meters and hours into Seconds.
That is,(60*1000)/(60min*60sec).
i.e.,1 km=1000m.
1 Hour=60min.
1 min= 60sec.
We get 16.67m/s.
That is, the train traveled 16.67 meters in 1 second.
Then multiply 9 seconds with 16.67 meters.
Then length of the train traveled 150 meters in 9 seconds.
(1)
Amol said:
1 decade ago
Why will take 18/5 please tell me?
Rahul said:
1 decade ago
We get 16.67m/s.
That is, the train traveled 16.67 meters in 1 second.
Then multiply 9 seconds with 16.67 meters.
Then length of the train traveled 150 meters in 9 seconds.
That is, the train traveled 16.67 meters in 1 second.
Then multiply 9 seconds with 16.67 meters.
Then length of the train traveled 150 meters in 9 seconds.
Shankaranathan .K said:
1 decade ago
Really its very nice guys. Thank you all for the explanation and your time spent in answering the question raised by other.
Akhil said:
1 decade ago
How many square feet is 1 metre ?
Sumit said:
1 decade ago
Why it is divide by 5/18?
Subhasri said:
1 decade ago
Another easy method for solving it.
In 3600 sec the train go 60 km.
In 1 sec the train will go 1/60km.
Then in 9 sec it will go (1/60) *9 = .15km = 150 meter.
In 3600 sec the train go 60 km.
In 1 sec the train will go 1/60km.
Then in 9 sec it will go (1/60) *9 = .15km = 150 meter.
Anu said:
1 decade ago
Why is the length of train calculated with the formula speed*time?
Vijay dabasiya said:
1 decade ago
Easy method.
1km=1000 m.
1 hr=3600 sec.
Formula length of = velocity*time.
= 60*1000/3600 *9.
= 150 m.
1km=1000 m.
1 hr=3600 sec.
Formula length of = velocity*time.
= 60*1000/3600 *9.
= 150 m.
Madhan said:
1 decade ago
They asked to find length of the train? but we gave an answer of distance traveled in 9sec, how these answers are same?
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