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

1. 85
2. 105
3. 126
4. 90

Correct answer: 126

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