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Two trains are running in opposite direction with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, the speed of each train (in km/hour) is
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- 72
- 10
- 36
- 18
Correct Option: C
Let the speed of each train be x kmph.
Their relative speed
= x + x = 2x kmph
| Time taken = | |
| Relative Speed |
| = | |
| 60 × 60 |
| 240 × | ||
| = | 1000 | |
| = | = | ||
| 300 | 1000x |
| x = | = 36 | |
| 1000 |
The required speed = 36 kmph.
