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A ship is streaming due West at 12 m^(-...

A ship is streaming due West at ` 12 m^(-1)`. A boy runs across the beach at ` 5 ms^(-1)` in a direction at right angles to the direction of motion of the ship towards South, Calculate the velocity of the boy relative to sea.

A

`13 m//s`

B

5 m//5`

C

`12 m//s`

D

`17 m//s`

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