-
How much time does a train, 50 m long, moving at 68 km/ hour take to pass another train, 75 m long, moving at 50 km/hour in the same direction ?
-
- 5 seconds
- 10 seconds
- 20 seconds
- 25 seconds
Correct Option: D
Both trains are moving in the same direction.
∴ Their relative speed
= (68 – 50) kmph = 18 kmph
| = 18 × | = 5 m/sec | |
| 8 |
Total length = 50 + 75 = 125 m
| ∴ Required time = | |
| Relative speed |
| = | = 25 seconds. | |
| 5 |
