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 14 of 59.
Arunkumar said:
1 decade ago
It's simple but don't use our brain in finding the answer.
Santosh said:
1 decade ago
The problems and you people's explanation and coordination and sharing knowledge. I like these very much.
Najrul Shaikh said:
1 decade ago
Save = (1-0.55-0.15)x = 12,750.
Salary = x = 42,500.
Salary = x = 42,500.
NA shilpa said:
1 decade ago
Nice way of teaching maths who don't understand.
Sushmi said:
1 decade ago
Length of a train = (speed *time).
1 km - 1000 meter.
60 km - ?
60*1000 = 6000 meter = speed.
1 hr - 3600 seconds.
? - 9 second.
3600/9 = time.
So, LENGTH OF TRAIN = 6000*3600/9 = 150 METER.
THIS METHOD VERY EASY.
1 km - 1000 meter.
60 km - ?
60*1000 = 6000 meter = speed.
1 hr - 3600 seconds.
? - 9 second.
3600/9 = time.
So, LENGTH OF TRAIN = 6000*3600/9 = 150 METER.
THIS METHOD VERY EASY.
Sai Nath said:
1 decade ago
Length of the train = L.
L = Speed (s)*Time (T).
L = S*T.
L = 60*5/18*9.
L = 60*5/2.
L = 300/2=>L = 150 m.
L = Speed (s)*Time (T).
L = S*T.
L = 60*5/18*9.
L = 60*5/2.
L = 300/2=>L = 150 m.
Sri said:
1 decade ago
If the answer means options are in KM what is the process?
Iram said:
1 decade ago
How its possible L = 60*5/18*9 = 60-5/2?
In this 2 is where from come give reply?
In this 2 is where from come give reply?
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.
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.
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