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P and Q are two points on the line x-y+1...

P and Q are two points on the line `x-y+1=0`, If OP=OQ=6 then length of median through O is

A

`1//2`

B

`1//sqrt(2)`

C

`1`

D

`7`

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The correct Answer is:
B
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AAKASH SERIES-STRAIGHT LINES-PRACTICE EXERCISE
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