Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 22)
22.
Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one.
Answer: Option
Explanation:
| Relative speed = | = (45 + 30) km/hr | |||||||
|
||||||||
|
We have to find the time taken by the slower train to pass the DRIVER of the faster train and not the complete train.
So, distance covered = Length of the slower train.
Therefore, Distance covered = 500 m.
 Required time = |
 |
500 x | 6 |  |
= 24 sec. |
| 125 |
Discussion:
81 comments Page 4 of 9.
Paul said:
7 years ago
This sum is followed by : t= (a+b)/(u+v).
Where: a is the length of the first train.
b: length of other trains.
u and v are the respective velocity.
Where: a is the length of the first train.
b: length of other trains.
u and v are the respective velocity.
B Kapil said:
7 years ago
The right answer will be 24 sec because here it is talking about the time to pass the driver, so the answer will be 24 sec, not 48sec.
Kineg said:
7 years ago
Can anyone explain to me how the distance came 500?
Mubarak said:
7 years ago
@Kineg.
Distance covered = length of the slower train.
So, it is 500m.
Distance covered = length of the slower train.
So, it is 500m.
Jay said:
7 years ago
500 should be the initial distance between two trains.
Shivank said:
9 years ago
Here we are assuming that driver is in front of the train, but generally, drivers are not in front and if the location of the driver is mentioned question will become more tricky.
Ruturaj said:
6 years ago
Not getting this, Please anyone explain it clearly.
Ankit gohel said:
6 years ago
If speed equals then what? Please tell me.
Reho Rex said:
6 years ago
This is the trick part of question no.14.
Krishna said:
2 years ago
@Sahil
Speed = d/t
Speed = 125/6
t = d/speed.
t = 500/(125/6) = 500 * 6/125.
Speed = d/t
Speed = 125/6
t = d/speed.
t = 500/(125/6) = 500 * 6/125.
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