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How long does a train, 75 metre long, moving at 60 km/hr take to pass a certain telegraph post?
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- 3.5 seconds
- 4.5 seconds
- 5 seconds
- 5.4 seconds
Correct Option: B
Distance covered by train = Length of train
Speed of train = 60 kmph
| = |  |  | m./sec. | |
| 18 |
| = | | | m./sec. | |
| 3 |
| ∴ Required time = | |
| Speed |
| = | | | seconds | |
| (50/3) |
| = | seconds | |
| 50 |
= 4.5 seconds
