Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 14)
14.
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:
Answer: Option
Explanation:
| Relative speed = (60 + 40) km/hr = |  |
100 x | 5 |  m/sec |
= | |
250 | m/sec. |
| 18 | 9 |
Distance covered in crossing each other = (140 + 160) m = 300 m.
| Required time = | |
300 x | 9 | sec |
= | 54 | sec = 10.8 sec. |
| 250 | 5 |
Discussion:
42 comments Page 3 of 5.
Harish said:
1 decade ago
1 km= 1000 m.
1 hr = 3600 sec.
So km/hr= 1000/3600= 10/36 = 5/18.
1 hr = 3600 sec.
So km/hr= 1000/3600= 10/36 = 5/18.
Kavitha said:
10 years ago
Its good thank you so much my child is learn now she is clever.
Sagar shinde said:
9 years ago
140 + 160/60 + 40.
= 300/100,
= 3,
= 3 * 18/5,
= 10.8.
= 300/100,
= 3,
= 3 * 18/5,
= 10.8.
(1)
Aishi sasmal said:
6 years ago
@Deep.
t = dis/speed.
300/250/9 = 300*9/250.
t = dis/speed.
300/250/9 = 300*9/250.
(1)
Javeed khan said:
6 years ago
(100*5%8).
27.7m/s,
140+260 = 300,
300/27.7 =10.8.
27.7m/s,
140+260 = 300,
300/27.7 =10.8.
(1)
Suman said:
1 decade ago
Hey we can cut it 250/9 = 125/3 we can write.
Vineet Nair said:
1 decade ago
I still don't understand as how we got 5/18?
Deepak said:
7 years ago
How it will come 10.8?
Please Explain me.
Please Explain me.
(1)
Yash said:
7 years ago
How it will come 10.8?
Please Explain me.
Please Explain me.
(1)
Syam said:
8 years ago
Thank you all for the given explanation.
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