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 11 of 21.
Bappy said:
9 years ago
As the length of trains is smaller than bridge so here train has to cover his as well as bridge distance. If the length of trains was bigger than platform then only by covering train's length platform length can be passed.
Asiri said:
10 years ago
The train is 240 m long. Therefore we add (650+240) together.
ASHWINI said:
10 years ago
We have to add train length because train has to travel the whole length of platform and it has to cover it's own length.
Soumya Biswas said:
10 years ago
The train of 240 m long passes a platform of length 650 m, that means it crosses its own length and the length of platform together.
Manoj Kumar said:
10 years ago
In the question, they have not mentioned that the pole is also on the platform, then how should we consider the train length upto pole also?
Bishal gupta said:
10 years ago
If 89 sec is the answer then the 890 m long. It is solved answer said 10 m/s. So if the train is 650 m then 65 sec will be the answer.
Swamy said:
1 decade ago
Well,
24 sec ---- 240 mt.
? sec ---- ((650+240)*24)/240 = 89 sec.
24 sec ---- 240 mt.
? sec ---- ((650+240)*24)/240 = 89 sec.
Brindha said:
1 decade ago
Because 10 m/s is speed of train.
Distance = speed/time.
(240+650) = 10/T.
890 (distance).
Time (T) = ?
10 (speed).
Time = 89 sec.
Distance = speed/time.
(240+650) = 10/T.
890 (distance).
Time (T) = ?
10 (speed).
Time = 89 sec.
Brindha said:
1 decade ago
Train distance + Platform distance = Total time.
Train speed, hence 240+650 = 89.
Speed = 10 m/s.
Train speed, hence 240+650 = 89.
Speed = 10 m/s.
Brindha said:
1 decade ago
Platform: 650 m
Train: 240 m.
If we didn't add distance it means. 65 seconds but the train still in platform.
So add the time to cross the pole with that. Now the correct time is 89 sec.
Train: 240 m.
If we didn't add distance it means. 65 seconds but the train still in platform.
So add the time to cross the pole with that. Now the correct time is 89 sec.
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