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:
619 comments Page 9 of 62.
Manikandan said:
3 years ago
Data:
T=9,
S=?,
L=?
Time = length/seconds.
S = 60*5/18.
S = 16.6666,
T = L/S.
9 = L/16.6666,
L = 9×16.6666,
L = 149.9,
L = 150.
T=9,
S=?,
L=?
Time = length/seconds.
S = 60*5/18.
S = 16.6666,
T = L/S.
9 = L/16.6666,
L = 9×16.6666,
L = 149.9,
L = 150.
(22)
Lokesh said:
4 months ago
Speed = 60 km/hr.
Convert to m/s: 60 × 1000.
3600 = 16.67 m/s
Time to cross the pole = 9 s
Length = Speed × Time
= 16.67 × 9
= 150 m.
Convert to m/s: 60 × 1000.
3600 = 16.67 m/s
Time to cross the pole = 9 s
Length = Speed × Time
= 16.67 × 9
= 150 m.
(22)
Anjali Singh said:
1 year ago
Should any one tell me how 5/18 came here?
(21)
Narayan Karki said:
3 years ago
Where,
Speed = Distance(s)/Time(t).
To convert speed into m/s from km/hr.
Then, use the formula = Speed x Time = 100/6 * 9 = 150m.
Speed = Distance(s)/Time(t).
To convert speed into m/s from km/hr.
Then, use the formula = Speed x Time = 100/6 * 9 = 150m.
(20)
Muhammed Jamsheer said:
2 years ago
@Raj
To convert km to metre;
Km - m = × 5/18.
m - km = × 18/5.
To convert km to metre;
Km - m = × 5/18.
m - km = × 18/5.
(20)
Ivan said:
1 year ago
I still don't understand. How 5/18 came? Please explain to me.
(20)
Raj said:
2 years ago
How 5/18 came? explain.
(18)
Amar Mali said:
2 years ago
Thanks everyone for explaining the answer.
(18)
Radhika C said:
1 year ago
Useful information, Thanks all.
(18)
Deepak said:
8 months ago
@All.
Here's my explanation:
1. You have to convert speed km/h into m/s.
And the formula to convert speed km/h into m/s is 60 x 5/18 (Note : 5/18 is a constant).
Speed = 16.67 m/s.
2. Distance = speed X time.
16.67 x 9 = 150m is the length of the train.
Here's my explanation:
1. You have to convert speed km/h into m/s.
And the formula to convert speed km/h into m/s is 60 x 5/18 (Note : 5/18 is a constant).
Speed = 16.67 m/s.
2. Distance = speed X time.
16.67 x 9 = 150m is the length of the train.
(18)
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