Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 8)
8.
A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
Answer: Option
Explanation:
| Formula for converting from km/hr to m/s: X km/hr = |  |
X x | 5 |  |
m/s. |
| 18 |
| Therefore, Speed = | |
45 x | 5 | m/sec |
= | 25 | m/sec. |
| 18 | 2 |
Total distance to be covered = (360 + 140) m = 500 m.
| Formula for finding Time = | |
Distance | |
| Speed |
 Required time = |
|
500 x 2 | sec |
= 40 sec. |
| 25 |
Discussion:
78 comments Page 7 of 8.
Anush said:
6 years ago
Why we are adding the train length with bridge length?
(1)
Naveenreddy said:
2 decades ago
It ok 500 m but how come (500x2)/25 explain please.
Prasun jana said:
10 years ago
Speed = 45*(5/18) = 12.5.
= (360+140)/12.5 = 40.
= (360+140)/12.5 = 40.
Chetan said:
10 years ago
Discussion was very nice it's very clear to all.
Aditya said:
1 decade ago
From where did 45*(5/18) came please explain?
Rohan said:
6 years ago
Why we have to add the length of the train?
Muthu said:
1 decade ago
How can u take total distance to be 500???
Ashok Reddy said:
1 decade ago
t=distance/speed;
t=500/(45*5/18);
t=40sec
t=500/(45*5/18);
t=40sec
Sam said:
2 decades ago
Hi How x*5/18 came there can't understand
Anonymus said:
1 decade ago
Nice sarvepalli great explanation. I got.
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