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CGP EDU Academic Team
Published on: August 13, 2026
A ray of light passing through the point A(1,2,3), strikes the plane x + y + z = 12 at B and on reflection passes through point C(3, 5, 9). Coordinates of point B is-
Text Solution
Verified by ExpertsThe correct answer is:
B
Image of point (1, 2, 3) about x + y + z = 12 is (5, 6, 7)
B is point of intersection of line BC with the plane
x + y + z = 12
Equation of BC is 
= 
= 
∴ coordinats of B is (–7, 0, 19)
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