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 35 of 50.
Swati warang said:
8 years ago
What is relative speed, can you explain in simple terms?
Suman said:
1 decade ago
Here given that (x-5) km/hr. What is 5? Please explain.
Mayurkapse said:
1 decade ago
18/5 divided because the conversion of m/sec to km/hr.
Ladura said:
8 years ago
What is the distance covered by the man in 10 seconds?
Abinaya said:
5 years ago
Why we should reciprocal 5/18 to 18/5? Please explain.
Gayu said:
1 decade ago
Why its divided by 15/8? need some brief explanation.
Sushma said:
1 decade ago
Why should we use x-5 here please explain once again.
Preethiammu said:
3 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?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers