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:
249 comments Page 21 of 25.
Naveen said:
8 years ago
Why you added train length and bridge length?
Agnel said:
7 years ago
45*5/18 = 12.5,
12.5*30 = 375,
375-130 = 245.
12.5*30 = 375,
375-130 = 245.
Gkvinodh said:
2 decades ago
How the equation (130 + x) /2 = 25/2 comes ?
Santosh said:
1 decade ago
Why we are subtracting the length of bridge?
Ahmad said:
7 years ago
(130 + x)/30 = 25/2.
What is meant by this?
What is meant by this?
(1)
Shashi said:
1 decade ago
We can solve by using formula also @Anusha.
Deepak Sahoo said:
4 years ago
Thanks for explaining the answer @Fathima.
(1)
Vijaybalajimuthujayam said:
7 years ago
Good explanation, Thanks @Nursat Fathima.
RAEES said:
1 decade ago
Nusrath fathima solved method is better.
Sathish said:
6 years ago
45 * (5÷18) = (Lb +130)/30.
Lb = 245 m.
Lb = 245 m.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers