If the lines (x-1)/(-3) =(y-2)/(2lambda...

If the lines `(x-1)/(-3) =(y-2)/(2lambda) =(z-3)/(2) " and " (x-1)/(3lambda) =(y-1)/(1)=(6-z)/(5)` are perpendicular to each other then find the value of `lambda`

`(5)/(7)`

`(7)/(5)`

`(-7)/(10)`

`(-10)/(7)`

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