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 6 of 59.
Aaftab ali said:
2 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)
Vaishnavi said:
9 months ago
60 * 9 = 540,
540 * 5/18 = 150.
540 * 5/18 = 150.
(36)
PRASHANTH said:
7 months ago
I still don't understand. How 5/18 came?
Please explain to me.
Please explain to me.
(35)
Jyothi said:
7 months 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.
(34)
Utkarsh Anand said:
5 months ago
@All.
5/18 was used to convert km/hr into m/sec.
5/18 was used to convert km/hr into m/sec.
(33)
Gurram bhargavi said:
1 year ago
Length of train = speed * time.
= 9 * 60 * 5/18(converting km/hr into m/sec).
= 150 meters.
= 9 * 60 * 5/18(converting km/hr into m/sec).
= 150 meters.
(32)
Pavitra said:
2 years ago
1m = 1/1000km and
1s=1/3600hr.
So 1m/s = 3600/1000 = 18/5km/h.
1s=1/3600hr.
So 1m/s = 3600/1000 = 18/5km/h.
(30)
Wick said:
2 years ago
@All.
Here, 5/18 is used to convert Km/hr to m/s.
Here, 5/18 is used to convert Km/hr to m/s.
(30)
Ajay said:
1 year ago
Thanks everyone for explaining the answer clearly.
(30)
Cheenie said:
2 years ago
5/18 means 5 meters/18 seconds so 5/18 is the conversion of 1km/h.
Thank you.
Thank you.
(29)
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