Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 6)
6.
A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?
Answer: Option
Explanation:
| Speed = |  |
240 |  m/sec = 10 m/sec. |
| 24 |
 Required time = |
|
240 + 650 | sec = 89 sec. |
| 10 |
Discussion:
202 comments Page 14 of 21.
Triveni said:
9 years ago
@Yuvi.
How? Briefly, explain your answer.
How? Briefly, explain your answer.
Sidhartha said:
9 years ago
The given answer is wrong.
Train length + platform length + train length = 240 + 650 + 240 = 1130 = the distance to be covered to cross the platform.
Time taken is 1130/speed (10m/s) = 113 sec.
Train length + platform length + train length = 240 + 650 + 240 = 1130 = the distance to be covered to cross the platform.
Time taken is 1130/speed (10m/s) = 113 sec.
Mir said:
9 years ago
We have to add both. Very simple, a train with 10 coaches will take a longer time to cross the platform as compared a train with just 3 coaches of the same length.
Sidhartha said:
9 years ago
The given answer is wrong.
Train length + platform length + train length = 240 + 650 + 240 = 1130 = the distance to be covered to cross the platform.
Time taken is 1130/speed (10m/s) = 113 sec.
Train length + platform length + train length = 240 + 650 + 240 = 1130 = the distance to be covered to cross the platform.
Time taken is 1130/speed (10m/s) = 113 sec.
Yash Mehta said:
9 years ago
Why you didn't add twice the length of the platform?
Shailesh said:
9 years ago
The given answer is correct.
We can be said the train passes only when the last engine is cross the platform. So the length of platform and length of the train is right.
We can be said the train passes only when the last engine is cross the platform. So the length of platform and length of the train is right.
Mustapha said:
9 years ago
The answer is just about a simple proportion.
Deeksha verma said:
9 years ago
I also think 65 sec is correct. 240 m is the length of the train.
Rohit said:
9 years ago
89 is the correct answer. Because the question is time taken by a train to cross the bridge, here 650m is the length of the bridge and 240m is the length of the train so 650 + 240.
Ayush Jain said:
9 years ago
I think that the and should be 65.
Since we have to take out speed and then to put in another.
Since we have to take out speed and then to put in another.
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