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Two trains 108 m and 112 m in length are running towards each other on the parallel lines at a speed of 45 km/hr and 54 km/ hr respectively. To cross each other after they meet, it will take
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- 12 sec
- 9 sec
- 8 sec
- 10 sec
Correct Option: C
Relative speed = 45 + 54 = 99 kmph
| = |  | 99 × |  | m/sec. | |
| 18 |
| or | m/sec. | |
| 2 |
| ∴ Required time = | |||||
| 2 | |||||
| = | = 8 seconds | |
| 55 |
