Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 3)
3.
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
Answer: Option
Explanation:
| Speed = |  |
45 x | 5 |  m/sec |
= | |
25 | m/sec. |
| 18 | 2 |
Time = 30 sec.
Let the length of bridge be x metres.
| Then, | 130 + x | = | 25 |
| 30 | 2 |
2(130 + x) = 750
x = 245 m.
Video Explanation: https://youtu.be/M_d8WufJWKc
Discussion:
252 comments Page 17 of 26.
RITESH said:
1 decade ago
I want to ask a simple question, how was to come 25/2 ? please send this answer ASAP.
Boopathi said:
2 decades ago
Hey how is it possible to come.
2 (130 + x) = 750.
X = 245 m.
Please advice me.
2 (130 + x) = 750.
X = 245 m.
Please advice me.
Nathy said:
2 decades ago
Sai's method of solving this problem is too simple and easy to understand. Thanks.
Siva Nandi Reddy said:
1 decade ago
Train length and bridge length is always add thats why we subtracted 130 from 375?
Rajan said:
2 decades ago
Periyasamy is perfectly correct and is the correct logic to solve the problem.
Rohit said:
2 decades ago
For just above explanation, bridge end point means, departure point of bridge.
Sanjeev said:
9 years ago
Speed = 45 x 5/18 m/sec = 25/2 m/sec.
How it is calculated?
Please explain.
How it is calculated?
Please explain.
Kuma said:
8 years ago
Speed=Distance/Time.
45*5/18=Distance/30,
375= Distance,
Length= 375-130=245.
45*5/18=Distance/30,
375= Distance,
Length= 375-130=245.
Jose said:
2 decades ago
Hey how is possible to come ?
2(130 + x) = 750
x = 245 m.
please advice me
2(130 + x) = 750
x = 245 m.
please advice me
Viji said:
1 decade ago
Vijay kumar your explanation is quite simple and understandable. Thank you.
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