Question: A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?
[A].320 m
350 m
650 m
Data inadequate
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
| Speed = | 300 | m/sec = | 50 | m/sec. | ||
| 18 | 3 |
Let the length of the platform be x metres.
| Then, | x + 300 | = | 50 | ||
| 39 | 3 |
3(x + 300) = 1950
x = 350 m.