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:
598 comments Page 6 of 60.
BIJAY said:
4 years ago
@All.
We know that;
Velocity = Distance/Time.
so we can write,
Distance = Velocity*Time.
= (16.66)*(9) meters [=> 60km/hr convert into meters = 60*5/18. = 16.66 meter/sec.].
= 150 meters. [ANS].
We know that;
Velocity = Distance/Time.
so we can write,
Distance = Velocity*Time.
= (16.66)*(9) meters [=> 60km/hr convert into meters = 60*5/18. = 16.66 meter/sec.].
= 150 meters. [ANS].
Kaustubh Kishor Salunkhe said:
9 months ago
@All Everyone,
For the people who asking how 5/18 came?
It is used to convert KMPH to MPS
Let me explain how and when to use it. The hint is in the Answers we can see 60 km/hr and answers in Meters.
If it's Vise Versa we will use 18/5 to get the answer in Kmph.
For the people who asking how 5/18 came?
It is used to convert KMPH to MPS
Let me explain how and when to use it. The hint is in the Answers we can see 60 km/hr and answers in Meters.
If it's Vise Versa we will use 18/5 to get the answer in Kmph.
(6)
Deepak said:
4 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)
Satyapal khetlan said:
1 decade ago
Given: Train velocity = 60 km/hr;
It's mean that at 1 hr, traveled distance by train, is 60 km;
1 sec. travel distance = 60,000/(3600) m (1 hr = 3600 sec. & 1 km = 1000 m).
So, 9 sec " " = (100/6)*9 m.
= 150 m.
So, 150 m, should be correct answer;
It's mean that at 1 hr, traveled distance by train, is 60 km;
1 sec. travel distance = 60,000/(3600) m (1 hr = 3600 sec. & 1 km = 1000 m).
So, 9 sec " " = (100/6)*9 m.
= 150 m.
So, 150 m, should be correct answer;
Sundar said:
1 decade ago
@Contactjerin
Feet to Meter conversion: 1 feet = 0.3048 meter
Meter to Feet conversion: 1 meter = 3.28083 feet
This is what I mentioned already in this discussion.
You can easily find the answer for your question that is:
3.28083 feet = 1 meter.
Feet to Meter conversion: 1 feet = 0.3048 meter
Meter to Feet conversion: 1 meter = 3.28083 feet
This is what I mentioned already in this discussion.
You can easily find the answer for your question that is:
3.28083 feet = 1 meter.
Harendra yadav said:
8 years ago
GIVEN:-
Speed of the train = 60 km/h.
Time = 9 sec.
Length of the train = ?
Formula : All lenth / time * 18/5 = speed.
Solution:-
All length/ time * 18/5 = 60,
?/9 * 18/5 =60,
? * 2/5 =60,
? * 1/5 = 30,
?*1 =30*5,
? = 150.
Answer :- 150 meter.
Speed of the train = 60 km/h.
Time = 9 sec.
Length of the train = ?
Formula : All lenth / time * 18/5 = speed.
Solution:-
All length/ time * 18/5 = 60,
?/9 * 18/5 =60,
? * 2/5 =60,
? * 1/5 = 30,
?*1 =30*5,
? = 150.
Answer :- 150 meter.
Agni said:
1 decade ago
Easy method.
60 km per hr.
1hr = 60 mins.
That means.
Per km = 60km/60mins = 1.
Per km 1 min.
Per km = 1000 meters.
Per min = 60 sec.
Train is running per second = 1000/60 = 16.666 mtrs.
Cross the pole in 9 second = 16.666*9 = 150 mtrs.
60 km per hr.
1hr = 60 mins.
That means.
Per km = 60km/60mins = 1.
Per km 1 min.
Per km = 1000 meters.
Per min = 60 sec.
Train is running per second = 1000/60 = 16.666 mtrs.
Cross the pole in 9 second = 16.666*9 = 150 mtrs.
Mahendra Budha said:
2 years ago
To find the length of the train, we can use the formula: length = (speed × time).
Given the speed is 60 km/hr and it crosses a pole in 9 seconds.
The length of the train would be 60 km/hr × (9 seconds ÷ 3600 seconds) = 0.15 km or 150 meters.
Given the speed is 60 km/hr and it crosses a pole in 9 seconds.
The length of the train would be 60 km/hr × (9 seconds ÷ 3600 seconds) = 0.15 km or 150 meters.
(52)
Apurva said:
1 decade ago
SOLUTION:
60 km/hr.
1k m = 1000 m.
1 hr = 60 min.
Therefore 60km/60min.
i.e. 1 km = 1 min.
1 min = 60 sec.
60 km/hr = (60*1000)/60 m/min.
60 km/hr = (60*1000)/(60*60) m/sec.
= 1000/60.
16.67 m/sec.
Distance in 9 sec = 16.67*9 = 150 m.
60 km/hr.
1k m = 1000 m.
1 hr = 60 min.
Therefore 60km/60min.
i.e. 1 km = 1 min.
1 min = 60 sec.
60 km/hr = (60*1000)/60 m/min.
60 km/hr = (60*1000)/(60*60) m/sec.
= 1000/60.
16.67 m/sec.
Distance in 9 sec = 16.67*9 = 150 m.
G hari krishna said:
9 years ago
You all converted km --> m. Why don't you convert seconds into hours?
Then S=d/t,
Then D=s*t.
But t=9 sec.
If we convert it into hours form we will get 1/400.
Then d=60*1/400.
Is it correct method. Let me explain in this way guys.
Then S=d/t,
Then D=s*t.
But t=9 sec.
If we convert it into hours form we will get 1/400.
Then d=60*1/400.
Is it correct method. Let me explain in this way guys.
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