AP EAMCET · Maths · Three Dimensional Geometry
A ray of light passing through the point \(A(1,2,3)\) strikes the plane \(x+y+z=12\) at \(B\) and on reflection if passes through \(C(3,5,9)\), then \(O B\) is equal to
- A \(\sqrt{420}\)
- B \(\sqrt{380}\)
- C \(\sqrt{410}\)
- D \(\sqrt{390}\)
Answer & Solution
Correct Answer
(C) \(\sqrt{410}\)
Step-by-step Solution
Detailed explanation
Let image of point \(A\) across \(x+y+z=12\) be Then, equation of line will be…
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