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:
630 comments Page 14 of 63.
Vivek said:
8 years ago
We calculated the train length with reference to the pole. But what about the length of the pole. Doesn't it come to picture here?
Please, anyone, clarify it.
Please, anyone, clarify it.
Pradeep said:
1 decade ago
Distance = speed*time(50/2*9 = 150) m.
So, 150 m is distance traveled by the train, length of the train can be lower than distance. So can't say 150 m exact.
So, 150 m is distance traveled by the train, length of the train can be lower than distance. So can't say 150 m exact.
Nagesh said:
1 decade ago
Distance = speed*time(50/2*9 = 150)m.
So, 150 m is distance traveled by the train, length of the train can be lower than distance. So can't say 150 m exact.
So, 150 m is distance traveled by the train, length of the train can be lower than distance. So can't say 150 m exact.
Rubiya said:
1 decade ago
If train takes 20 seconds means taking more time to cross the pole. It means length of train is more 20*50/3 is 333.3. Therefore here train length increases.
KEITH said:
1 decade ago
So when the questions says find the length of the train, in such case we have to find the distance i.e. by using the distance formula.
D=S*T.
S=D/T.
T=D/S.
D=S*T.
S=D/T.
T=D/S.
Datta pawar said:
10 years ago
First convert value:
60km = 60000mtr.
1 hour = 3600sec.
Calculation.
60000/3600 = 16.666 mtr/sec (this value for only one meter).
So 9 * 16.666 = 150mtr.
60km = 60000mtr.
1 hour = 3600sec.
Calculation.
60000/3600 = 16.666 mtr/sec (this value for only one meter).
So 9 * 16.666 = 150mtr.
Priyanka padhi said:
1 decade ago
Thanks @Sundar. That's was a very nice explanation. For those who are not strong in this section, this is the best way to make them easily understandable.
Asif Bilakhiya said:
8 years ago
Train Speed=60km/hr.
Take 9 seconds to cross the pole.
60km =60000 metres,
1hr=3600 seconds,
Ans=150 metres,
Explanation:
=(9x60000)/(3600),
=150 metres.
Take 9 seconds to cross the pole.
60km =60000 metres,
1hr=3600 seconds,
Ans=150 metres,
Explanation:
=(9x60000)/(3600),
=150 metres.
Hemanth Sairam said:
3 years ago
(60kms / 3600 secs) x 9 secs = 0.15kms
0.15kms in mtrs = 150 mtrs
If the train taken 3600 seconds to travel 60kms,
Then how much for 9 secs?
That’s it.
0.15kms in mtrs = 150 mtrs
If the train taken 3600 seconds to travel 60kms,
Then how much for 9 secs?
That’s it.
(48)
Arun said:
1 decade ago
To remember the formula velocity = d/t (M/s).
d is distance measured in metre(m).
T is the time taken in seconds(s).
So the unit of velocity is (m/s).
d is distance measured in metre(m).
T is the time taken in seconds(s).
So the unit of velocity is (m/s).
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