Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 3)
3.
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
Answer: Option
Explanation:
| Speed = |  |
45 x | 5 |  m/sec |
= | |
25 | m/sec. |
| 18 | 2 |
Time = 30 sec.
Let the length of bridge be x metres.
| Then, | 130 + x | = | 25 |
| 30 | 2 |
2(130 + x) = 750
x = 245 m.
Video Explanation: https://youtu.be/M_d8WufJWKc
Discussion:
252 comments Page 26 of 26.
Vanitha peddireddy said:
4 weeks ago
Train = 130.
Bridge = x.
Distance = 45,
1000/3600 = 5/18.
45 * 5/18 * 30 = 375,
375 - 130 = 245 = C.
Bridge = x.
Distance = 45,
1000/3600 = 5/18.
45 * 5/18 * 30 = 375,
375 - 130 = 245 = C.
(2)
Charan singh said:
3 weeks ago
2 years ago.
Length of train = 130m.
Length of bridge = ?.
1hr = 3600sec.
= 3600/30.
= 120.
1km = 1000m.
= 45000/120.
= 375m.
The length of the train is less in total.
375-130 = 245.
Length of train = 130m.
Length of bridge = ?.
1hr = 3600sec.
= 3600/30.
= 120.
1km = 1000m.
= 45000/120.
= 375m.
The length of the train is less in total.
375-130 = 245.
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