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 26 of 59.
Mahabir said:
7 years ago
Superb explanation. Thanks all.
Prasanna said:
7 years ago
Nice explanation. Easy to understands. Thanks all.
Aman said:
7 years ago
We have to multiply 5/18 to convert the km/hr to m/s.
We have to convert it because time is given in seconds.
We have to convert it because time is given in seconds.
Nicky said:
7 years ago
Hi Raneesh,
You have explained in very clear but I have a doubt =( 60 *5/18) * 9, how did *5/18.
Speed = Distance/Time.
Distance = Speed * Time.
Or lenght = Speed * Time .
=( 60 *5/18) * 9,
= 50/3 * 9,
= 50 * 3 ,
= 150 meter.
You have explained in very clear but I have a doubt =( 60 *5/18) * 9, how did *5/18.
Speed = Distance/Time.
Distance = Speed * Time.
Or lenght = Speed * Time .
=( 60 *5/18) * 9,
= 50/3 * 9,
= 50 * 3 ,
= 150 meter.
Mansoor said:
7 years ago
Superb explanation, Thanks @Sundar.
Gopi said:
7 years ago
Thank you all for explaining the answer.
Anomi said:
7 years ago
@Charmi.
20%+70%+10%(1800) =100%,
10% is 1800,
so 10x1800 = 18000.
12600(70%) + 3600(20%) + 1800 (10%) = 18000 (100%).
20%+70%+10%(1800) =100%,
10% is 1800,
so 10x1800 = 18000.
12600(70%) + 3600(20%) + 1800 (10%) = 18000 (100%).
Nilesh nande said:
7 years ago
Best explanations, thank you all.
Alpesh said:
7 years ago
1 km = 1000 m,
1 hours= 60 min.
60km=6 hours that 1km=1 hours,
1000/60*9=150,
So, D. 150 is correct.
1 hours= 60 min.
60km=6 hours that 1km=1 hours,
1000/60*9=150,
So, D. 150 is correct.
Sunil sharma said:
7 years ago
Tse speed of train 60km/h,
cross the poll with in 9 sec.
speed of train in 1 mint. = 1km,
Now, speed of train in 1 sec.= 1000/60= 16.67,
Now the length of train= 16.67*9 = 150 m.
cross the poll with in 9 sec.
speed of train in 1 mint. = 1km,
Now, speed of train in 1 sec.= 1000/60= 16.67,
Now the length of train= 16.67*9 = 150 m.
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