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:
626 comments Page 1 of 63.
Santhosh said:
6 days ago
It's good. Thanks all for explaining the answer.
(3)
Pallavi said:
1 week ago
The answer is 150m/s.
(2)
Naresh said:
1 week ago
Good Explanation. Thanks everyone.
(3)
Akhil lal said:
3 weeks ago
So the pole been exposed to the train for 9 sec, in a speed of 60km/hr, which is equivalent to covering a distance equals speed (m/s) x time (s) = 150m.
(1)
Akhil lal said:
3 weeks ago
Here L = speed(m/s) x time(s).
= 150m.
= 150m.
(1)
Shrinitha said:
1 month ago
I think the Answer is 150.
(5)
Muhammad Ashfaq said:
1 month ago
Thanks all for explaining the answer.
(4)
Sai dinesh nakka said:
2 months ago
Distance = speed * time.
= 60 * 5/18 * 9,
= 150m.
= 60 * 5/18 * 9,
= 150m.
(8)
Dhanu said:
2 months ago
The speed of the train = 60km/hr.
Pole cross time = 9 sec
So, convert speed into secs 1hr =60 minutes per minute 60 sec.
to convert 1hr in sec = 60 * 60 = 3600sec.
Now, convert km into meters 1km = 1000m.
then, speed = (60 * 1000/3600) m/s.
= (60 * 5/18) = 16.67m/s.
Now, the length of the train = speed * time.
= 16.67 * 9 = 150m.
Pole cross time = 9 sec
So, convert speed into secs 1hr =60 minutes per minute 60 sec.
to convert 1hr in sec = 60 * 60 = 3600sec.
Now, convert km into meters 1km = 1000m.
then, speed = (60 * 1000/3600) m/s.
= (60 * 5/18) = 16.67m/s.
Now, the length of the train = speed * time.
= 16.67 * 9 = 150m.
(64)
Prathna Ravindra said:
2 months ago
1 km = 1000 m.
1 hr = 3600 s.
So, Speed = distance/time = 1000/3600 = 5/18 m/s.
Therefore, converting 60km/hr to m/s i.e. 60 * 5/18 = 50/3 m/s.
That is Distance =Speed * time = 50/3 * 9 = 150m.
--DETAILED EXPLANATION--
1 km = 1000 m.
60 km = ?.
That is 60 * 1000/1 = 60000 m (Distance).
1 hr = 3600 s (Time).
Therefore,
Speed = Distance/Time = 60000/3600 = 50/3 m/s (Speed).
Crosses Pole in 9 seconds.
So, to find the length of the train, that is Distance = Speed * Time = 50/3 * 9 =150 m.
1 hr = 3600 s.
So, Speed = distance/time = 1000/3600 = 5/18 m/s.
Therefore, converting 60km/hr to m/s i.e. 60 * 5/18 = 50/3 m/s.
That is Distance =Speed * time = 50/3 * 9 = 150m.
--DETAILED EXPLANATION--
1 km = 1000 m.
60 km = ?.
That is 60 * 1000/1 = 60000 m (Distance).
1 hr = 3600 s (Time).
Therefore,
Speed = Distance/Time = 60000/3600 = 50/3 m/s (Speed).
Crosses Pole in 9 seconds.
So, to find the length of the train, that is Distance = Speed * Time = 50/3 * 9 =150 m.
(30)
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