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Two trains of length 137 metre and 163 metre are running with speed of 42 km/hr and 48 km/hr respectively towards each other on papallel tracks. In how many seconds will they cross each other?
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- 30 sec
- 24 sec
- 12 sec
- 10 sec
Correct Option: C
Relative speed = 42 + 48 = 90 kmph
| = |  |  | m/s = 25 m/s | |
| 18 |
Sum of the length of both trains
= 137 + 163 = 300 metres
| ∴ Required time = | = 12 seconds. | |
| 25 |
