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:
584 comments Page 2 of 59.
Sneha said:
3 months ago
How did you calculate 5/18? Please explain to me.
(40)
Naveen said:
3 months ago
Kilometers to meters: There are 1000 meters in 1 kilometer.
Hours to seconds: There are 60 minutes in 1 hour, and 60 seconds in 1 minute, so there are 60×60=3600 seconds in 1 hour.
So, to convert a speed from km/hr to m/sec, you multiply by 3600 seconds1000 meters.
Now, let's simplify that fraction:
36001000 = 3610 = 185.
Hours to seconds: There are 60 minutes in 1 hour, and 60 seconds in 1 minute, so there are 60×60=3600 seconds in 1 hour.
So, to convert a speed from km/hr to m/sec, you multiply by 3600 seconds1000 meters.
Now, let's simplify that fraction:
36001000 = 3610 = 185.
(10)
Rohit Chouhan said:
3 months ago
First we converted into m/s to speed.
So length = speed *time.
So, length =50 * 3 = 150.
So length = speed *time.
So, length =50 * 3 = 150.
(11)
Shraddha Jadhav said:
3 months ago
150 is the correct answer.
(5)
Shalini P said:
4 months ago
Thanks eveyone for explaining the answer.
(13)
Yash said:
5 months ago
150 is the correct answer.
(11)
Radhika C said:
5 months ago
Useful information, Thanks all.
(18)
Tapentadol said:
5 months ago
60km = 60000m.
1hr = 3600sec.
Now, if 60000m = 3600sec,
x = 9sec.
x = 60000m * 9sec/3600sec.
x = 150m.
1hr = 3600sec.
Now, if 60000m = 3600sec,
x = 9sec.
x = 60000m * 9sec/3600sec.
x = 150m.
(147)
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.
(32)
SRIRAM said:
5 months ago
Why we are calculating 5/18 not 18/5? Please explain it.
(23)
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