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:
247 comments Page 20 of 25.
Deep said:
1 decade ago
Easy method is by using time and distance formula.
Sandhya said:
9 years ago
Can you explain me in detail? I can't understand.
Madan said:
1 decade ago
45*5/18 = 12.5.
12.5*30 = 375.
375-130 = 245.
12.5*30 = 375.
375-130 = 245.
Poonam Pipaliya said:
1 decade ago
What is role of 30 sec and from where it comes?
Rajesh said:
2 years ago
Why do we take 5/18, anyone, please Explain it?
(15)
Pradnya said:
1 decade ago
I can't understand your answer please explain.
Thamilarasan said:
1 decade ago
Have any common formulas for easily learning?
Bala said:
1 decade ago
45*5/18 = 12.5.
12.5*30 = 375.
375-130 = 245.
12.5*30 = 375.
375-130 = 245.
Guru said:
8 years ago
Why is 5/18 coming here? Please explain that.
Naveen said:
8 years ago
Why you added train length and bridge length?
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