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:
613 comments Page 15 of 62.
Naldo said:
3 years ago
How do we get 50/3? please explain.
(37)
Petchi Raja said:
3 years ago
@All.
Here, is my expplanation.
The train runs at 60 km/hr which means it will reach 60 km in 60 mins.
therefore 1 km/min = 1000m/60s = 16.66m/1s,
The train crosses 16.66 metres for each second.
So 16.66 * 9 = 150.
Here, is my expplanation.
The train runs at 60 km/hr which means it will reach 60 km in 60 mins.
therefore 1 km/min = 1000m/60s = 16.66m/1s,
The train crosses 16.66 metres for each second.
So 16.66 * 9 = 150.
(185)
Cheenie said:
3 years ago
5/18 means 5 meters/18 seconds so 5/18 is the conversion of 1km/h.
Thank you.
Thank you.
(29)
Mahen said:
3 years ago
1 km = 1000 meter.
and 1 hrs= 3600 sec.
So converting it in mtr/sec= 1000/3600.
So, you will get 5/18.
and 1 hrs= 3600 sec.
So converting it in mtr/sec= 1000/3600.
So, you will get 5/18.
(73)
Raj said:
3 years ago
@All.
speed(60)*1000(KM convert to meters)/3600(Hoursconvrt to sec)
->60*1000/3600 = 60 * 5/18 = 50/3.
speed(60)*1000(KM convert to meters)/3600(Hoursconvrt to sec)
->60*1000/3600 = 60 * 5/18 = 50/3.
(9)
Arun said:
3 years ago
1km = 1000 meters.
1 hour = 3600 sec.
So, 1000/3600 = 5/18.
1 hour = 3600 sec.
So, 1000/3600 = 5/18.
(13)
Aaftab ali said:
3 years ago
Speed = 60 km/hr
Time = 9
Length = ?
Length = speed * time.
The first step convert km/hr into m/s
Formula is [ km/hr * 5/18 ] = m/s.
So,
60 km/hr * 5/18 = 50/3 m/s.
Now you have speed in metre so find the length now......
Speed * time = length.
50/3 * 9 = ? (Length).
150 = length.
So, the answer is 150 m.
Time = 9
Length = ?
Length = speed * time.
The first step convert km/hr into m/s
Formula is [ km/hr * 5/18 ] = m/s.
So,
60 km/hr * 5/18 = 50/3 m/s.
Now you have speed in metre so find the length now......
Speed * time = length.
50/3 * 9 = ? (Length).
150 = length.
So, the answer is 150 m.
(36)
Aathilakshmi said:
3 years ago
Length of the train = Speed × Time.
Time=9s.
Speed = 60 km/hr. (To convert speed into m/s from km/hr)
1km = 1000m so 60km = 60000m.
1 hr = 3600seconds.
Speed = 60000/3600 m/s.
= 50/3 m/s.
Length of the train = Speed × time.
= 50/3×9.
= 150m.
Time=9s.
Speed = 60 km/hr. (To convert speed into m/s from km/hr)
1km = 1000m so 60km = 60000m.
1 hr = 3600seconds.
Speed = 60000/3600 m/s.
= 50/3 m/s.
Length of the train = Speed × time.
= 50/3×9.
= 150m.
(78)
Sri said:
3 years ago
How we get 5 /18? Please explain to me.
(89)
Hemanth Sairam said:
3 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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