Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 5)
5.
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
Answer: Option
Explanation:
| Speed = |  |
54 x | 5 |  m/sec = 15 m/sec. |
| 18 |
Length of the train = (15 x 20)m = 300 m.
Let the length of the platform be x metres.
| Then, | x + 300 | = 15 |
| 36 |
x + 300 = 540
x = 240 m.
Discussion:
276 comments Page 19 of 28.
Rock said:
10 years ago
Train speed = 15 m/s.
Time different = 36-20 = 16 sec.
Length of platform is 16*15 = 240 meter.
Time different = 36-20 = 16 sec.
Length of platform is 16*15 = 240 meter.
Manoj Dhawade said:
1 decade ago
We have to do 15*36 because train crosses the platform in 36 sec. So the answer should be 300 m.
Swamy said:
10 years ago
Well,
36 sec - 20 sec = 16 sec.
Then,
36 sec ----- 540 mt.
16 sec ----240 mt (train length).
36 sec - 20 sec = 16 sec.
Then,
36 sec ----- 540 mt.
16 sec ----240 mt (train length).
Ganesh Babu Korlapati said:
6 years ago
Why we cannot take 15*36.
Because dist = speed x time know. 36seconds is also speed only know.
Because dist = speed x time know. 36seconds is also speed only know.
Suresh said:
1 decade ago
Satheesh your answer is very easy and simple way of maintain the problem solution. Thank you.
Tara said:
1 decade ago
The above answer can be solved by Jagadeesh & Verti given method, i thinkg its also rite.
Rakshith said:
7 years ago
Can anybody explain me why are we taking 36-20, and Why 540-300?
Please explain this step.
Please explain this step.
Vetri said:
2 decades ago
Train passes 36 sec but man standing 20sec so (36-20=16)
speed= 15m/sec
length=16*15=240m
speed= 15m/sec
length=16*15=240m
Kranthi said:
1 decade ago
As they asked only platform length why isn't it 35X15=540...
why should we substract...??
why should we substract...??
Bhatu said:
1 decade ago
Friends I think the actual answer is 540m, please tell me anybody it is correct or not?
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