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 26 of 48.
Mahinia said:
1 decade ago
Train is same dxn and man is also some dxn it means it means speed is minus x-5 = 125/10*18/5 = 50.
Yrs said:
9 years ago
Both train and man move same direction then relative speed is the sum of train speed and man speed.
Shivam tomar said:
7 years ago
Speed of the train relative to man = 125/10 m/sec.
I am confused in this step, please clarify it.
I am confused in this step, please clarify it.
Rahul agrawal said:
2 years ago
125 m = 10sec
Than 60sec = 125 x 6 = 750m
1hour = 750 x 60 = 45000m (45km/hr) + 5km/hr = 50km/hr.
Than 60sec = 125 x 6 = 750m
1hour = 750 x 60 = 45000m (45km/hr) + 5km/hr = 50km/hr.
(60)
Omsingh more said:
6 years ago
They should mention "relative speed" in the question. Why it is not so? It confuses the examiner!
Nanda said:
1 decade ago
Relative speed = (x-5) km/hr and x-5 = 45.
What is the inner meaning for that can any one say?
What is the inner meaning for that can any one say?
Givid said:
1 decade ago
I have a doubt on question. Whose speed is 5km/hr? either the man's or train's? please explain.
Santhosh K said:
1 year ago
@All.
Why do we minus the speed of the man moving in the same direction? Please explain to me.
Why do we minus the speed of the man moving in the same direction? Please explain to me.
(39)
Ananya said:
8 years ago
How can the answer be 50 that's the point x-5 would be 40 kmph?
Then how can b be the answer?
Then how can b be the answer?
M.kanna said:
1 decade ago
18/5 explanation is super k/m h/r put 1000/3600=5/18 answer is very nice apserve then nice.
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