A 10cm long rod AB moves with its ends o...

A 10cm long rod AB moves with its ends on two mutually perpendicular straight lines OX and OY . If the end A be moving at the rate of `2cm//sec`, then when the distance of A from O is 8cm, the rate at which the end B is moving is

A

`8/3cm//sec`

B

`4/3cm//sec`

C

`2/9cm//sec`

D

None of these

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The correct Answer is:

A

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