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MHT CET202012 Oct 2020Evening ShiftMathematicsThree Dimensional GeometryActual

If the lines 1-x 2 = y-8 = z-5 2 and x-11 5 = y-3 3 = z-1 1 are perpendicular, then =

Options

  1. A4
  2. B-4
  3. C8 3
  4. D-8 3

Correct answer

C. 8 3

Step-by-step solution

We have 1-x 2 = y-8 = z-5 2 x-1 -2 = y-8 = z-5 2 Direction ratio of given lines are -2, , 2 and 5,3,1 . Given lines are er. -2(5)+ (3)+2(1)=0-10+3 +2=0 = 8 3

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