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Two trains running in opposite direction...

Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is

A

`2 : 3`

B

`4 : 3`

C

`3 : 2`

D

`3 : 4`

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The correct Answer is:
D
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