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.
Agni said:
1 decade ago
Easy method.
60 km per hr.
1hr = 60 mins.
That means.
Per km = 60km/60mins = 1.
Per km 1 min.
Per km = 1000 meters.
Per min = 60 sec.
Train is running per second = 1000/60 = 16.666 mtrs.
Cross the pole in 9 second = 16.666*9 = 150 mtrs.
60 km per hr.
1hr = 60 mins.
That means.
Per km = 60km/60mins = 1.
Per km 1 min.
Per km = 1000 meters.
Per min = 60 sec.
Train is running per second = 1000/60 = 16.666 mtrs.
Cross the pole in 9 second = 16.666*9 = 150 mtrs.
Naresh Thummala said:
1 decade ago
Distance = Speed x time.
Length = (60 x 5/18) x 9.
= 150 MTRS.
Length = (60 x 5/18) x 9.
= 150 MTRS.
Digvijaysinh said:
1 decade ago
In 3600 sec. train travel 60000 meter than in 9 sec. How many meter it travels?
9*60000/3600 = 150 meter.
9*60000/3600 = 150 meter.
Saran said:
1 decade ago
Distance = time*speed.
Distance = 9sec*60(km/hr).
Here the the time is in 'seconds' and answer will given into the 'm', so we will convert all the values into the 'm&sec'.
1km = 1000m.
1hr = 3600sec.
Then,
Distance = 9*60(1000/3600).
Distance = 9*60(5/18).
Distance = 150m.
Distance = 9sec*60(km/hr).
Here the the time is in 'seconds' and answer will given into the 'm', so we will convert all the values into the 'm&sec'.
1km = 1000m.
1hr = 3600sec.
Then,
Distance = 9*60(1000/3600).
Distance = 9*60(5/18).
Distance = 150m.
Guna sekhar said:
1 decade ago
What is the pole it is any terminal?
Srikanth said:
1 decade ago
Velocity = distance/time.
Distance = velocity*time.
= 60*(0.27)(9).
= 150 m/s.
Distance = velocity*time.
= 60*(0.27)(9).
= 150 m/s.
Nehru said:
1 decade ago
Answer = (sec/meter)*1000(multiple with 1000 to convert to speed).
Speed = 9/150*1000 = 60.
Speed = 9/150*1000 = 60.
Palakananda said:
1 decade ago
Thanks for nice explanation you can solve same as followed.
Total exp = 15%+55% = 70%
Let salary Rs.100
Save = 100-70 = Rs.30%
Rs.30% = 12750.
100% = 12750/30x100 = 42500.
Total exp = 15%+55% = 70%
Let salary Rs.100
Save = 100-70 = Rs.30%
Rs.30% = 12750.
100% = 12750/30x100 = 42500.
Sikkanthar said:
1 decade ago
Here they are converting the unit of speed from kmph into m/s.
So they are taking the equal value of each one like.
Km = 1000m.
1 hour = 3600s.
So they are using the value of 5/18 here.
They what formula they were used to solve this problem means.
Length/time = speed.
So we can calculate unknown with help of given data.
So they are taking the equal value of each one like.
Km = 1000m.
1 hour = 3600s.
So they are using the value of 5/18 here.
They what formula they were used to solve this problem means.
Length/time = speed.
So we can calculate unknown with help of given data.
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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