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Let the plane P: 4x-y+=10 be rotated by ...

Let the plane `P: 4x-y+=10` be rotated by an angle `pi/2` about its line of intersection with the plane `x+y-z=4`. If `alpha` is the distance of the point `(2,3,-4)` from the new position of the plane P, then `35alpha ` is equal to

A

`105`

B

`90`

C

`85`

D

`126`

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