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:
597 comments Page 4 of 60.
Ezhil N said:
1 year ago
Conversion formula for km/hr into m/sec = 5/18.
Conversion formula for m/sec into k/m = 18/5.
Conversion formula for m/sec into k/m = 18/5.
(55)
Nisar Ahmed said:
2 years ago
60 Km/hr.
1 km = 1000 m
1 hr = 60 min.
1 min = 60 sec.
Converting km/hr into m/sec.
1000m / 3600sec = 5/18,
So, we got this 5/18, Got it.
Now, Just multiply this by the actual value,
(Distance = Speed × Time),
that is; 60 * 5/18 = 50/3 m/sec and this distance is for one sec.
For 9 sec,
multiply 50/3 by 9.
50/3 * 9 = 150m.
1 km = 1000 m
1 hr = 60 min.
1 min = 60 sec.
Converting km/hr into m/sec.
1000m / 3600sec = 5/18,
So, we got this 5/18, Got it.
Now, Just multiply this by the actual value,
(Distance = Speed × Time),
that is; 60 * 5/18 = 50/3 m/sec and this distance is for one sec.
For 9 sec,
multiply 50/3 by 9.
50/3 * 9 = 150m.
(54)
Astha said:
4 months ago
How come 5/18? Please explain.
(54)
Mahendra Budha said:
2 years ago
To find the length of the train, we can use the formula: length = (speed × time).
Given the speed is 60 km/hr and it crosses a pole in 9 seconds.
The length of the train would be 60 km/hr × (9 seconds ÷ 3600 seconds) = 0.15 km or 150 meters.
Given the speed is 60 km/hr and it crosses a pole in 9 seconds.
The length of the train would be 60 km/hr × (9 seconds ÷ 3600 seconds) = 0.15 km or 150 meters.
(52)
Lokesh said:
3 years ago
Why do we use 5/18. Can anybody explain me? please.
(51)
Mahalakshmi Chatrathi said:
2 years ago
60 km/hr = 60 * 1000m/60 * 60 = 50/3m/s.
#speed = distance/time,
1km = 1000m,
1hr = 60m&
1min = 60s.
Then Length(l) = speed * time
l = 50/3 * 9 = 1350/9.
l = 150m.
#speed = distance/time,
1km = 1000m,
1hr = 60m&
1min = 60s.
Then Length(l) = speed * time
l = 50/3 * 9 = 1350/9.
l = 150m.
(51)
Jaydeep said:
2 years ago
Here, 60km/h = 60 * 1000/3600 m/s.
(50)
Murali said:
3 years ago
Length = time/speed.
= 9sec/60kmhr.
= 0.15km = 150meter.
= 9sec/60kmhr.
= 0.15km = 150meter.
(49)
Threennath said:
3 years ago
How we get 5/18? please explain to me.
(49)
Hemanth Sairam said:
2 years ago
(60kms / 3600 secs) x 9 secs = 0.15kms
0.15kms in mtrs = 150 mtrs
If the train taken 3600 seconds to travel 60kms,
Then how much for 9 secs?
That’s it.
0.15kms in mtrs = 150 mtrs
If the train taken 3600 seconds to travel 60kms,
Then how much for 9 secs?
That’s it.
(48)
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