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 18 of 21.
Pankaj said:
1 decade ago
Shouldn't it be 650+(240*2)?
Pardhu said:
1 decade ago
Here train passing both the pole as well as the plate form ....
in question they clearly mentioned pole passing time in seconds only......
so we have to solve first 240/24 =10sec..
and than
(240+650/10)=890/10=89 sec.......
in question they clearly mentioned pole passing time in seconds only......
so we have to solve first 240/24 =10sec..
and than
(240+650/10)=890/10=89 sec.......
Madhu said:
1 decade ago
Here starting position (source) is train length and ending position is platform length (destination) ok.
Sarah said:
1 decade ago
@Kirubanidhi
Thanks for the clear explanation.
Thanks for the clear explanation.
Ravinderreddy said:
1 decade ago
Why to add train length &platform length?
Vels said:
1 decade ago
Anyone explain
They are asking 650 only know. Then why we are adding 240+650.
They are asking 650 only know. Then why we are adding 240+650.
Saiyam said:
1 decade ago
Length of platform = 640m
and entire train length = 240m
the Q. is we have to find time taken by train to pass entire platform.
so we include train length utill its last coach passing the platform.
time considered up to its last coach left the platform.
ok.
and entire train length = 240m
the Q. is we have to find time taken by train to pass entire platform.
so we include train length utill its last coach passing the platform.
time considered up to its last coach left the platform.
ok.
Hitesh said:
1 decade ago
We add both of them because we have to calculate the time taken to cross the platform. 240 is the length of train. So total distance, the engine has to cover is 240 (train length) + 650 (platform length).
Dharmendra ISIT said:
1 decade ago
The answer will be 65 only bcoz
train which is 240m long passes a pole in 24sec
so the speed of train is 240/24=10m/s
when speed of train is 10m/s then what time it will take to cross the platform which is 650m long i.e 650/10=65sec
two distance will be add when question will be like this
A train 240 m long passes a platform which is 650m long in 24 seconds the speed of train is?
train which is 240m long passes a pole in 24sec
so the speed of train is 240/24=10m/s
when speed of train is 10m/s then what time it will take to cross the platform which is 650m long i.e 650/10=65sec
two distance will be add when question will be like this
A train 240 m long passes a platform which is 650m long in 24 seconds the speed of train is?
Tulsi said:
1 decade ago
The distance taken by the train is nothing but the time taken by the train to cross the pole so ... the train passing the pole(time) is 24sec.
ie 240m ->24
slly
650->65sec.
The total time taken by the train to passing the station is=65+24=89sec.
ie 240m ->24
slly
650->65sec.
The total time taken by the train to passing the station is=65+24=89sec.
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