Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 17)
17.
A train 800 metres long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
Answer: Option
Explanation:
| Speed = |  |
78 x | 5 |  |
m/sec | = | |
65 | |
m/sec. |
| 18 | 3 |
Time = 1 minute = 60 seconds.
Let the length of the tunnel be x metres.
| Then, | |
800 + x | |
= | 65 |
| 60 | 3 |
3(800 + x) = 3900
x = 500.
Discussion:
52 comments Page 5 of 6.
Rohan said:
6 years ago
Why need to convert 1 minute to 60 seconds?
Thanu said:
1 decade ago
I was little confused. How that 5 came?
Yt prasad said:
6 years ago
65/3 * 60 = 65 * 20 = 1300 - 800 = 500.
(2)
Sumana said:
1 decade ago
Why we convert 78 meter into seconds?
Sahdev said:
8 years ago
3(800+x) =3900 = 1500.
Then x = 500?
Then x = 500?
John said:
1 decade ago
Can I know from where did 5/18 came?
Sampanna said:
1 decade ago
From where did that 5 upon 18 came.
Sugi said:
1 decade ago
Hi friends how that 3900 came ?
Parameshwar said:
10 years ago
May I know, how we got 5/18?
Karthik said:
9 years ago
How the 5/18 came?
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