-
A train crosses a platform in 30 seconds travelling with a speed of 60 km/h. If the length of the train be 200 metres, then the length (in metres) of the platform is
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- 400
- 300
- 200
- 500
Correct Option: B
Speed of train = 60 kmph
| = |  | 60 × |  | m/sec. | |
| 18 |
| = | m/sec. | |
| 3 |
If the length of platform be = x metre, then
| ∴ Speed of train = | |
| Time taken in crossing |
| ⇒ | = | ||
| 3 | 30 |
⇒ 50 × 10 = 200 + x
⇒ x = 500 – 200 = 300 metre
