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Two trains of lengths 150m and 180m respectively are running in opposite directions on parallel tracks. If their speeds be 50 km/hr and 58 km/hr respectively, in what time will they cross each other?
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- 22 seconds
- 15 seconds
- 30 seconds
- 11 seconds
Correct Option: D
Relative speed = (50 + 58) kmph
| = |  | 108 × |  | m/sec. | |
| 18 |
= 30 m/sec
| ∴ Required time = | |
| Relative Speed |
| = | | | seconds | |
| 30 |
| = | | | seconds | |
| 30 |
= 11 seconds
