Aptitude - Problems on Trains - Discussion
Discussion Forum : Problems on Trains - General Questions (Q.No. 11)
11.
A 270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train?
Answer: Option
Explanation:
Relative speed = (120 + 80) km/hr
| = |  |
200 x | 5 |  m/sec |
| 18 |
| = | |
500 | m/sec. |
| 9 |
Let the length of the other train be x metres.
| Then, | x + 270 | = | 500 |
| 9 | 9 |
x + 270 = 500
x = 230.
Discussion:
66 comments Page 5 of 7.
Reeha said:
7 years ago
Relative speed is to be found when two moving objects or trains are given.
Pari said:
7 years ago
If we want to find kmph means 15/8.
mph means 8/15 simple formula.
mph means 8/15 simple formula.
Amudha said:
1 decade ago
To find length of one train why we are calculating relative speed?
Arulmozhi said:
1 decade ago
Hai friends,
Having any other shortcut method to this problem?
Having any other shortcut method to this problem?
Ajinkya said:
4 years ago
Here x + 270/9 = 500/9.
How to simplify this? Please explain.
How to simplify this? Please explain.
(2)
Santosh adithya said:
1 decade ago
Why there is (x+270)/9 acc. to formula (270+x)/500/9 = 9 right?
Arun said:
9 years ago
When we add the relative speed when substract please tell me?
Priya said:
1 decade ago
Opposite direction: Adding.
Same Direction: Subtract.
Same Direction: Subtract.
(1)
Abhishek Pandey said:
1 decade ago
Always opposite will add and same will be subtract.
Anurag said:
10 years ago
D = S*T = 270+x = 500/9*9.
So x = 500-270 = 230.
So x = 500-270 = 230.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers