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OA and OB are two roads enclosing an ang...

OA and OB are two roads enclosing an angle of `120^(@)`.X and y start from 'O' at the same time. X travels along OA with a speed of `(4km)/(hour)` and Y travels along OB with a speed of `(3km)/(hour)`.The rate at which the shortest distance between X and Y is increasing after 1 hour is

A

`sqrt (37 km)/(h)`

B

`(37 km)/(h)`

C

`(13 km)/(h)`

D

`sqrt (13km)/(h)`

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The correct Answer is:
A
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