Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 2)
2.
A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:
Answer: Option
Explanation:
| Speed of the train relative to man = |  |
125 |  m/sec |
| 10 |
| = | |
25 | m/sec. |
| 2 |
| = | |
25 | x | 18 | km/hr |
| 2 | 5 |
= 45 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.
x - 5 = 45 
x = 50 km/hr.
Discussion:
487 comments Page 25 of 49.
Rajeev said:
1 decade ago
Nice explanation.
Sourav said:
1 decade ago
Why did we not converted 125 m to km?
Sahil said:
1 decade ago
Nice answer with explanation. It is very easy to understand.
Ankur said:
1 decade ago
A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:
Kindly solve it with full description.
Kindly solve it with full description.
Priyan singh said:
1 decade ago
How can be its 50 ?
It's 45 km/hr.
If we put answer 45 km as speed of train.
Time = 125/45*5/18 = 10 m/s.
But if we 50 we can't get its time. 10 m/s.
Explain someone ?
It's 45 km/hr.
If we put answer 45 km as speed of train.
Time = 125/45*5/18 = 10 m/s.
But if we 50 we can't get its time. 10 m/s.
Explain someone ?
Pattinson said:
1 decade ago
18/5 is to convert seconds to hours.
Vaitheesh kumar said:
1 decade ago
Guys I have one doubt for finding out the relative speed we should need to subtract but here it's divided please explain me how?
Seena said:
1 decade ago
Can someone please tell me? When we make the use of relative speed?
Kamal said:
1 decade ago
Options only in km/hr.
Nagamani said:
1 decade ago
In the given question 5 km\hr. So why you are calculated only km per hour?
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