1.

The plane 4x+7y+4z+81=0 is rotated through a right angle about its line of intersection with the plane 5x+3y+10z=25. If the equation of plane in its new position is x−4y+6z=k, then the value of k is equal to

Answer»

The plane 4x+7y+4z+81=0 is rotated through a right angle about its line of intersection with the plane 5x+3y+10z=25. If the equation of plane in its new position is x4y+6z=k, then the value of k is equal to



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