Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 4)
4.
Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is:
Answer: Option
Explanation:
Let the speeds of the two trains be x m/sec and y m/sec respectively.
Then, length of the first train = 27x metres,
and length of the second train = 17y metres.
 |
27x + 17y | = 23 |
| x+ y |
27x + 17y = 23x + 23y
4x = 6y
| |
x | = | 3 | . |
| y | 2 |
Discussion:
233 comments Page 23 of 24.
Deb said:
7 years ago
We can solve by (27-23)/(23-17).
Sandeep said:
10 years ago
It is simplest form. I'm happy.
Mahesh said:
7 years ago
860m, It consists of two cases.
Kripita said:
9 years ago
Very well explained. Thanks.
Yous said:
8 years ago
Why we should divide by x+y?
Kavya said:
7 years ago
Good answer, Thanks @Shyam.
Kartik said:
1 decade ago
Excellent explanation SRI.
SAURABH PANDEY said:
7 months ago
Very well done. Thanks.
(5)
Boomathi said:
1 decade ago
very good solution....
Anuj said:
8 years ago
23-27:23-17.
4:6
2:3
4:6
2:3
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