Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 1)
1.
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
Answer: Option
Explanation:
| Speed = |  |
60 x | 5 |  m/sec |
= | |
50 | m/sec. |
| 18 | 3 |
Length of the train = (Speed x Time).
 Length of the train = |
|
50 | x 9 | m = 150 m. |
| 3 |
Discussion:
587 comments Page 52 of 59.
Shunmuk Siva Narappa R said:
1 year ago
To solve this question, you can use the formula:
Length of train = (Speed of train * Time taken to cross the pole).
Given:
Speed of train = 60 km/hr.
Time taken to cross the pole = 9 seconds.
First, convert the speed from km/hr to m/s.
60 km/hr = 60*(5/18) = 50/3 m/s.
Now, plug the values into the formula:
Length of train = (50/3 * 9).
Length of train = 150 meters.
Therefore, the length of the train is 150 meters.
Length of train = (Speed of train * Time taken to cross the pole).
Given:
Speed of train = 60 km/hr.
Time taken to cross the pole = 9 seconds.
First, convert the speed from km/hr to m/s.
60 km/hr = 60*(5/18) = 50/3 m/s.
Now, plug the values into the formula:
Length of train = (50/3 * 9).
Length of train = 150 meters.
Therefore, the length of the train is 150 meters.
(95)
Edward Casandra oghenekaro said:
1 year ago
Here, how did you get the 50? Anyone, please explain to me.
(42)
Jaydeep said:
1 year ago
Here, 60km/h = 60 * 1000/3600 m/s.
(50)
Vamsi said:
1 year ago
Thanks all for explaining the answer.
(37)
Soumik Mukherjee said:
1 year ago
60 * (5/18) = 50/3.
Speed = Distance/ Time.
Distance = Speed * Time = (50/3) * 9,
= 150 m.
Speed = Distance/ Time.
Distance = Speed * Time = (50/3) * 9,
= 150 m.
(25)
Ajay said:
1 year ago
Thanks everyone for explaining the answer clearly.
(30)
Mhs said:
1 year ago
The train is running at 60 km per hour and it crosses the poll in 9 seconds to calculate the length of the train the formula is length = speed * time
let's calculate;
60 km = 60000 m.
60 min = 60 * 60 = 3600 sec,
let's calculate speed per second:
60000/ 3600 = 16.666666 = 16.666666 m/s.
In one second train covered the 16.666666 m.
so the train crossed the poll in 9 second.
so;
16.666666 * 9 = 150.
let's calculate;
60 km = 60000 m.
60 min = 60 * 60 = 3600 sec,
let's calculate speed per second:
60000/ 3600 = 16.666666 = 16.666666 m/s.
In one second train covered the 16.666666 m.
so the train crossed the poll in 9 second.
so;
16.666666 * 9 = 150.
(195)
LUBNA said:
12 months ago
but how do we convert km into m?? and where does that 5/18 come from?
Anyone, please explain to me.
Anyone, please explain to me.
(26)
Gauri Bhalerao said:
12 months ago
How 5/18 came, can anyone explain me? Please.
(40)
VVVR said:
12 months ago
1km = 1000m.
1hour = 3600sec.
1000/3600 = 5/18 mps.
1hour = 3600sec.
1000/3600 = 5/18 mps.
(87)
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