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JEE Advanced 2018 Paper 2

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Question : 48

Total: 54

Let P be a point in the first octant, whose image Q in the plane x+y=3(that is, the line segment PQ is perpendicular to the plane x+y=3 and the mid-point of PQ lies in the plane x+y=3 ) Lie on the z-axis. Let the distance of P from the x-axis be 5. If R is the image of P in the xy-plane, then the length of PR is_____

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