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:
486 comments Page 49 of 49.
Ankita said:
2 decades ago
Why its substracted?
(1)
Saji said:
2 decades ago
18/5 is to convert m/s to km/hr
(1)
Shwetha A V said:
2 decades ago
60*60/1000=18/5
(1)
M.saravanan said:
2 decades ago
Please explain 18/5.
(1)
Jothi said:
2 decades ago
Please explain to sutract -5 but ans is 50.
(4)
Swati said:
2 decades ago
Why is it divided by 18/5?
(2)
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