Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 6)
6.
A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?
Answer: Option
Explanation:
| Speed = |  |
240 |  m/sec = 10 m/sec. |
| 24 |
 Required time = |
|
240 + 650 | sec = 89 sec. |
| 10 |
Discussion:
202 comments Page 2 of 21.
IndiaBIX said:
2 decades ago
Well said Kumar.
Here 240m is the length of train, 650m is the length of Platform.
If we don't add 240m, we can only calculate the time taken by the part of engine to cross the bridge, not by the entire train.
That's why we are adding length of the train to platform length (distance = length of train + length of platform).
Reference: Important Formulas - Problems on Trains
Here 240m is the length of train, 650m is the length of Platform.
If we don't add 240m, we can only calculate the time taken by the part of engine to cross the bridge, not by the entire train.
That's why we are adding length of the train to platform length (distance = length of train + length of platform).
Reference: Important Formulas - Problems on Trains
Saji said:
2 decades ago
Kumar thanks a lot. You cleared my doubt. I am confusing this concept for long time.
Himanshu said:
2 decades ago
Since the train has to cover the the length of the platform and its own distance..we have too take the total distance of platform and the length of train.
Smita said:
2 decades ago
I think this is simple
if
train 240 m long passes a pole in 24 seconds.
i.e 240 m : 24 sec
then 650 m : ? sec
and the ans is is 65sec
may this ans is also correct
will u plz explain why r u add 240& 650?
if
train 240 m long passes a pole in 24 seconds.
i.e 240 m : 24 sec
then 650 m : ? sec
and the ans is is 65sec
may this ans is also correct
will u plz explain why r u add 240& 650?
Prabhakaran said:
1 decade ago
The question asked is only How long will it take to pass a platform 650 m long. Why we should add 250? Can any one explain?
Jessie said:
1 decade ago
The question is how long the train takes to travel the platform. Then why do we add the train length here? can you please explain. Itz bit confusing.
L.Karthikeyan said:
1 decade ago
L.Karthick Said.
Thanks Guys I understand the concept clearly thanks.
Thanks Guys I understand the concept clearly thanks.
Sanjay said:
1 decade ago
I think KUmar is correct...
Jellli said:
1 decade ago
Hi, I think
1.first we have to find speed of the train
s=240/24=10(in cond of the the train sross the pole)
2.then the same cross the platform of 630m then t=?
s=d/t
t=d/s=(240+650)/10(here we have to add the both len of train and platform)
=89s
1.first we have to find speed of the train
s=240/24=10(in cond of the the train sross the pole)
2.then the same cross the platform of 630m then t=?
s=d/t
t=d/s=(240+650)/10(here we have to add the both len of train and platform)
=89s
Krishna said:
1 decade ago
Data is not sufficient where is the pole length ?????
if the train is passing a platform of length 650m
then time taken = (650+240)/speed of train
speed of train = (length of train + length of pole) / 24 sec
= (240 + length of pole)/24 sec
note : 240/24 is not always correct ...
if the train is passing a platform of length 650m
then time taken = (650+240)/speed of train
speed of train = (length of train + length of pole) / 24 sec
= (240 + length of pole)/24 sec
note : 240/24 is not always correct ...
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers