Question: A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
[A].120 m
240 m
300 m
None of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
| Speed = | 54 x | 5 | m/sec = 15 m/sec. | |
| 18 |
Length of the train = (15 x 20)m = 300 m.
Let the length of the platform be x metres.
| Then, | x + 300 | = 15 |
| 36 |
x + 300 = 540
x = 240 m.