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:
206 comments Page 14 of 21.
Milesh bhange said:
1 decade ago
Don't forget to add trains length, question is asking answer about how much time it will take to cross a platform means train will star platforms one end to another in 65 seconds and what about trains end means its length 240 meter question said how much time it will take to cross a whole train means trains end. You have to add 240 its trains length.
HARIHARAN said:
1 decade ago
Which is the right answer 65 or 89?
Please help me.
Please help me.
Triveni said:
1 decade ago
@Yuvi.
How? Briefly, explain your answer.
How? Briefly, explain your answer.
Sidhartha said:
1 decade 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:
1 decade 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:
1 decade 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:
1 decade ago
Why you didn't add twice the length of the platform?
Shailesh said:
1 decade 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:
1 decade ago
The answer is just about a simple proportion.
Deeksha verma said:
1 decade ago
I also think 65 sec is correct. 240 m is the length of the train.
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