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A train run towards tunnel AB. A cat is ...

A train run towards tunnel AB. A cat is seen from entrance A at a distance of 4/7 of AB in the tunnel. When train blows horn, cat starts running. If cat run towards entrance, then train catches him at A and if run towards exit B, train catches him outside the tunnel and that point is located at 5/7 distance of tunnel length. Find ratio of speeds of train and cat ?

A

A - `5 : 1`

B

B - `1 : 3`

C

C - `2 : 5`

D

D - `3 : 1`

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The correct Answer is:
B
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