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:
475 comments Page 35 of 48.
Sushma said:
1 decade ago
Why should we use x-5 here please explain once again.
Preethiammu said:
2 years ago
Very nice, thanks everyone for explaining the answer.
(28)
Mahendra said:
1 decade ago
Nice explanation sheela thank you all who commented.
Veena said:
1 decade ago
Why train speed has to be subtracted with man speed?
Ajay said:
8 years ago
As per my calculation, 50 km/hr is the right answer.
Suraj Kumar Swami said:
7 years ago
x-5 = 45 the result should be 40, then why it is 50?
Vijayagopal said:
2 decades ago
Why 125/10 the 10 is divided 125 please explain it.
(2)
Muhammed areeb said:
1 decade ago
Why use 60*60/1000(18/5) I do not understand that?
Bharat Gupta said:
7 years ago
Please explain the relative speed = (x - 5) km/hr.
Preethi said:
1 decade ago
Thanks Abhishek now I clear about relative speed.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers