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 4 of 5.
Deep said:
6 years ago
Why we calculate 9/250 instead of 250/9?
(2)
Akhil v said:
2 weeks ago
Thanks all for explaining the answer.
Ishita said:
8 years ago
Can we use formula here - a+b/(u+v)?
Varma said:
9 years ago
@All.
Thank you friends I got it.
Thank you friends I got it.
Pooja said:
8 years ago
How it will come 10.8? Explain me.
(1)
Syed abbas said:
2 years ago
How is it possible 9/250 and 54/5?
(2)
Sabikun said:
5 years ago
54/5 = 1.8.
How it could be 10.8.
How it could be 10.8.
Aanchal said:
9 years ago
Got it. Thanks @Praveen Sharma.
Kiran said:
1 decade ago
How 300 m distance covered??
Lokesh said:
10 years ago
How can come 54/5 = 10.8?
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