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 32 of 59.
Dinesh said:
1 decade ago
It has come approximately 150.03 is this correct or exact answer should be 150.
Satyapal khetlan said:
1 decade ago
Given: Train velocity = 60 km/hr;
It's mean that at 1 hr, traveled distance by train, is 60 km;
1 sec. travel distance = 60,000/(3600) m (1 hr = 3600 sec. & 1 km = 1000 m).
So, 9 sec " " = (100/6)*9 m.
= 150 m.
So, 150 m, should be correct answer;
It's mean that at 1 hr, traveled distance by train, is 60 km;
1 sec. travel distance = 60,000/(3600) m (1 hr = 3600 sec. & 1 km = 1000 m).
So, 9 sec " " = (100/6)*9 m.
= 150 m.
So, 150 m, should be correct answer;
Grace said:
1 decade ago
60000 = 3600.
x = 9.
Cross multiply.
= 3600 x/60000*9.
Answer is 150.
x = 9.
Cross multiply.
= 3600 x/60000*9.
Answer is 150.
Arvind_ap said:
1 decade ago
1 km = 1000 meters.
1 hr = 3600 seconds.
1 km/hr = 1000/3600 m/s.
= 10/36 m/s.
= 5/18 m/s.
1 km/hr = 5/18 m/sec.
60 km/hr = 60 x 5/18 m/sec.
= (60 x 5)/18.
= 300/18.
So in 1 sec speed is 16.66.
9 sec = 16.66*9 = 150.
1 hr = 3600 seconds.
1 km/hr = 1000/3600 m/s.
= 10/36 m/s.
= 5/18 m/s.
1 km/hr = 5/18 m/sec.
60 km/hr = 60 x 5/18 m/sec.
= (60 x 5)/18.
= 300/18.
So in 1 sec speed is 16.66.
9 sec = 16.66*9 = 150.
Mohammed asif said:
1 decade ago
Similarly 60 km/hr = 60 x 5/18 m/sec.
Kindly explain how this line how 150 meters came?
Kindly explain how this line how 150 meters came?
Bob Matthew said:
1 decade ago
@Mohammed Asif.
60x5/18=50/3. Now since the train crossed the pole in 9 seconds you multiply 50/3x9=150.
Hope this helps.
60x5/18=50/3. Now since the train crossed the pole in 9 seconds you multiply 50/3x9=150.
Hope this helps.
Peter said:
1 decade ago
Can someone please explain how 60x5/18=50/3?
Simon Newfield said:
1 decade ago
@Peter.
60x5/18 = 50/3 because 60x5/18 = 16.
66666666666667 Now we must convert this to a whole number which is 50. To get 50 you must multiply 16.66666666666667 with 3.
So you write it down as 50/3 because 50/3 equals 16.66666666666667.
60x5/18 = 50/3 because 60x5/18 = 16.
66666666666667 Now we must convert this to a whole number which is 50. To get 50 you must multiply 16.66666666666667 with 3.
So you write it down as 50/3 because 50/3 equals 16.66666666666667.
Tapan Kumar Majhi said:
1 decade ago
60*5/18*9 = 150.
Darshan thakur said:
1 decade ago
60 km/3600 sec = 0.016667.
0.016667 km/sec*9 sec = 0.15 sec.
0.15 sec*1000 meter = 150 meter.
0.016667 km/sec*9 sec = 0.15 sec.
0.15 sec*1000 meter = 150 meter.
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