Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 15)
15.
A train 110 metres long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?
Answer: Option
Explanation:
Speed of train relative to man = (60 + 6) km/hr = 66 km/hr.
| = |  |
66 x | 5 |  m/sec |
| 18 |
| = | |
55 | m/sec. |
| 3 |
 Time taken to pass the man = |
|
110 x | 3 | sec = 6 sec. |
| 55 |
Discussion:
35 comments Page 4 of 4.
Vamshi said:
7 years ago
@Arun.
110/x = 55/3.
X = 110 * 3/55.
110/x = 55/3.
X = 110 * 3/55.
(1)
Vishnu said:
6 years ago
@All.
The man is running right so so we need to find the distance travelled by him then only we can add with a distance of the train.
The man is running right so so we need to find the distance travelled by him then only we can add with a distance of the train.
(1)
Melvin Michael said:
6 years ago
Hi, I am confused with the solution provided here:
Let the time taken be - X.
Relative speed = 66 KMPH = 55/3 meters/sec.
Distance = 110 + (5/3)X, (5/3)X being the distance covered by man.
Distance = Speed * Time.
(5/3)X +110 = (55/3) * X.
On resolving this, X comes to 6.6 seconds.
Please correct me when I am wrong.
Let the time taken be - X.
Relative speed = 66 KMPH = 55/3 meters/sec.
Distance = 110 + (5/3)X, (5/3)X being the distance covered by man.
Distance = Speed * Time.
(5/3)X +110 = (55/3) * X.
On resolving this, X comes to 6.6 seconds.
Please correct me when I am wrong.
(2)
Sunil said:
6 years ago
Hi, I don't know how it is calculated.
(66*5/18) = 55/3.
(66*5/18) = 55/3.
(2)
Smith Patel said:
5 years ago
@Melvin Michael.
It's true that if we consider the distance taken by a man in running towards the train , the answer becomes 6.6.
But the man is running in the opposite direction so sign of that distance becomes negative and hence,
Ans becomes 5.5.
It's true that if we consider the distance taken by a man in running towards the train , the answer becomes 6.6.
But the man is running in the opposite direction so sign of that distance becomes negative and hence,
Ans becomes 5.5.
(3)
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