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:
493 comments Page 31 of 50.
Jeevanantham said:
2 decades ago
How to relative 45 with man running speed. Please explain it any one.
Nivetha said:
9 years ago
What is the meaning of (x-5) then, x-5=45?
Please explain this line.
Please explain this line.
Raghu said:
2 decades ago
How it is 3600/1000. It will come as 1000/3600 only. Please explain.
NIRMAL said:
1 decade ago
Vijay Kumar Kuppani you did solve problem very nicely again thanks.
Ramkumar said:
1 decade ago
Why use 60*60/1000(18/5) I do not understand that?
Please explain.
Please explain.
Seena said:
1 decade ago
Can someone please tell me? When we make the use of relative speed?
Suma said:
1 decade ago
Can someone please tell me? When we make the use of relative speed?
Vishal said:
9 years ago
@Rachit.
The answer should be in m/s according to it not in km/hr.
The answer should be in m/s according to it not in km/hr.
Gowtham said:
2 decades ago
Hey why we findind relative speed??? They asking only speed na????
(1)
Amar G J said:
9 years ago
It is the conversion of km/hr to m/s.
km/hr = 1000/3600 = 5/18m/s.
km/hr = 1000/3600 = 5/18m/s.
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