Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 5)
5.
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
Answer: Option
Explanation:
| Speed = |  |
54 x | 5 |  m/sec = 15 m/sec. |
| 18 |
Length of the train = (15 x 20)m = 300 m.
Let the length of the platform be x metres.
| Then, | x + 300 | = 15 |
| 36 |
x + 300 = 540
x = 240 m.
Discussion:
287 comments Page 26 of 29.
Manisha dambe said:
8 years ago
Time to pass platform = 16s,
length of platform=t*s,
= 16*54*5/18=245.
The length of platform=245 m.
length of platform=t*s,
= 16*54*5/18=245.
The length of platform=245 m.
Harsh said:
8 years ago
I think the answer should be 540.
Because, how can the length of the platform be less than the length of the trian?
Because, how can the length of the platform be less than the length of the trian?
Somnath sen said:
8 years ago
Anyone Please explain it for me.
Sagar Dombale said:
8 years ago
What is 5/18? Please explain me.
Jesudas said:
8 years ago
@Sagar Dombale.
It's the conversion of km/h to m/s.
It's the conversion of km/h to m/s.
Remee Rahul said:
7 years ago
Does the man standing on the starting/intial point of the platform?
Ramya said:
7 years ago
Please explain, how come 15*20?
Length of the train means we have to do 15*36, right?
Length of the train means we have to do 15*36, right?
Abhi singh said:
7 years ago
54 * 5/18 = 15.
You have values than 36-20 after you get=16, now
15*16 = 240m/s,
And this is easily finding your ans = 240m/s.
You have values than 36-20 after you get=16, now
15*16 = 240m/s,
And this is easily finding your ans = 240m/s.
Suraj said:
7 years ago
Here, it is solved by taking 15*20 but why?
20 is speed of man not a train. We are taking into account that speed of train. If we take the speed of train then answer will becomes zero.
20 is speed of man not a train. We are taking into account that speed of train. If we take the speed of train then answer will becomes zero.
Vrunda savaliya said:
7 years ago
First substract time =36-20 = 16.
Then,
16 * 54 * 5/18.
Length = 240m.
Then,
16 * 54 * 5/18.
Length = 240m.
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