A boy standing by the side of a railway ...

A boy standing by the side of a railway track that an Up train crosses him in 8 seconds and a Down train of twice the length of that of the Up train crosses him in 20 seconds. How long (in seconds) will the two trains take to cross each other?

A

20

B

`15`

C

`12 (1)/(3)`

D

`13 (1)/(3)`

Verified by Experts

The correct Answer is:

D

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