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:
626 comments Page 16 of 63.
Srinivas said:
10 years ago
Yeah@ obviously. Mr. Sundar your answer was right but I think your solution is complicated. I need as simple as possible. Will you provide?
SAI MOHAN REDDY said:
1 decade ago
In the above question we can change minutes for seconds.
60*5/18 = (50/3) m/sec.
Length of the train is = (Speed*Time) = 50/3*9 = 150 m.
60*5/18 = (50/3) m/sec.
Length of the train is = (Speed*Time) = 50/3*9 = 150 m.
Nrsp said:
1 year ago
Convert km/h to m/s.
1km = 1000m.
1hour = 3600sec.
Speed = 60km/h.
= 60 × 1000/3600,
= 60 × (5/18),
= 50/3.
1km = 1000m.
1hour = 3600sec.
Speed = 60km/h.
= 60 × 1000/3600,
= 60 × (5/18),
= 50/3.
(16)
SREENIVASULU said:
2 years ago
Given, S = 60 km/hr,
Time(T) = 9 sec and L(T)=?
Speed(S) = (60 * 5/18) = (50/3 m/sec).
L(T) = S * T.
L(T) = (50/3*9)m.
= 150m.
Time(T) = 9 sec and L(T)=?
Speed(S) = (60 * 5/18) = (50/3 m/sec).
L(T) = S * T.
L(T) = (50/3*9)m.
= 150m.
(10)
Lokesh said:
6 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.
(23)
Kalden said:
1 decade ago
Guys nice explanation but I have confusion that km/hour and meter/sec. Then what about minute? Actually we should take meter/minute.
Sam said:
1 decade ago
1000/60 = 16.666.
= 16.666x9 = 150.
One more 1000/10 = 100.
= 60/10 = 6.
= 100 mtr/6 sec.
= 50 mtr/3 sec.
So 150 mtr in 9 sec.
= 16.666x9 = 150.
One more 1000/10 = 100.
= 60/10 = 6.
= 100 mtr/6 sec.
= 50 mtr/3 sec.
So 150 mtr in 9 sec.
Afzal said:
10 years ago
Hello @Sundar,
I'm not understanding this 1 km/hr = 1000/3600 m/s.
But.
How come this?
= 10/36 m/s.
= 5/18 m/s.
Please explain.
I'm not understanding this 1 km/hr = 1000/3600 m/s.
But.
How come this?
= 10/36 m/s.
= 5/18 m/s.
Please explain.
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)
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)
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