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:
285 comments Page 29 of 29.
Keerthi said:
5 years ago
Why we, not multiple 15 * 36 instead we multiple 15 * 20? Please explain.
Sharath Naik said:
5 years ago
Why they have taken 20 sec. Can we take 30 sec also? Please explain.
Vishakha said:
1 month ago
I think if we multiply speed with time of platform then it is 540.
DHANASURIYA M G said:
3 weeks ago
Length of the platform = 240 meters.
This method uses the basic distance = speed × time formula and accounts for the difference in time when crossing a man versus a platform.
This method uses the basic distance = speed × time formula and accounts for the difference in time when crossing a man versus a platform.
Ashok Kumar said:
3 days ago
Thanks everyone, for explaining the answer.
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