Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 14)
14.
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:
Answer: Option
Explanation:
| Relative speed = (60 + 40) km/hr = |  |
100 x | 5 |  m/sec |
= | |
250 | m/sec. |
| 18 | 9 |
Distance covered in crossing each other = (140 + 160) m = 300 m.
| Required time = | |
300 x | 9 | sec |
= | 54 | sec = 10.8 sec. |
| 250 | 5 |
Discussion:
42 comments Page 5 of 5.
Indraneel Mal said:
2 years ago
72kmph = 20m/sec.
In 26 seconds, the distance covered = 20 * 26 = 520m.
As the length of the platform is 250m.
Therefore the length of the train = 520 - 250 = 270m.
In 26 seconds, the distance covered = 20 * 26 = 520m.
As the length of the platform is 250m.
Therefore the length of the train = 520 - 250 = 270m.
(5)
Akhil v said:
2 weeks ago
Thanks all for explaining the answer.
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