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 18 of 59.
Kumar Verma said:
8 years ago
When we say a train passes a pole in given time then basically we consider that pole as stationary point (having 0 speed) whose length is zero means actually train crosses its own length in given time frame. If we say a running train passes another train (stationery or running) then we have to consider the total length of two trains crossing each other also we have to consider the relative speed of the trains if both trains are running in same direction then relative speed is the difference of their speed and if both are running in opposite direction then their relative speed is sum of their speed.
(1)
ALI AZAM said:
4 years ago
60km/hr convert into meters = 60*5/18 = 16.66 meter/sec.
This is for 1 second = 16.66 meter.
For 9 seconds just multiply by 9 = 16.66 * 9 = 150meter.
We already know that 1km/hr = 5/18meter/second.
1 meter/second = 18/5 km/hr.
This is for 1 second = 16.66 meter.
For 9 seconds just multiply by 9 = 16.66 * 9 = 150meter.
We already know that 1km/hr = 5/18meter/second.
1 meter/second = 18/5 km/hr.
(1)
Micheal Raj P said:
3 years ago
60km is converted to 60000m and 1 hour to 3600sec, there for 60000/3600 answer to 16.66 and multiple to 9sec and answer is 149.999.
So, here, the full value as 150 metres.
So, here, the full value as 150 metres.
(1)
Rahul said:
3 years ago
Thanks everyone for the answer.
(1)
Vuruturu Jyothi sankar said:
6 months ago
Speed = 60 km/h = 60 * 5/18
= 50/3 m/s.
Time taken = 9 sec.
Length = speed * time = 50/3 * 9.
=150 m.
= 50/3 m/s.
Time taken = 9 sec.
Length = speed * time = 50/3 * 9.
=150 m.
(1)
B.V.S.SHARMA said:
1 decade ago
60*5/18*9=150 m...
V.Navin kumar said:
1 decade ago
Nice to learn fast.
Naveen said:
1 decade ago
@B.V.S.Sharma
60*(5/18)*9=150 m...
60*(5/18)*9=150 m...
Pooja said:
1 decade ago
Hi.Thank you for guiding students for MCA & MBA...
Poonam said:
1 decade ago
No need of MBA & MCA coaching classes. Thank you.
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