If the lines \[\frac{x-1}{-3}=\frac{y-2}{2k}=\frac{z-3}{2}\], \[\frac{x-1}{3k}=\frac{y-5}{1}=\frac{z-6}{-5}\] are at right angles, then k = [MP PET 1997, 2001]

If the lines \[\frac{x-1}{-3}=\frac{y-2}{2k}=\frac{z-3}{2}\], \[\frac{

1.	If the lines \[\frac{x-1}{-3}=\frac{y-2}{2k}=\frac{z-3}{2}\], \[\frac{x-1}{3k}=\frac{y-5}{1}=\frac{z-6}{-5}\] are at right angles, then k = [MP PET 1997, 2001]
A.	?10
B.	\[\frac{10}{7}\]
C.	\[\frac{-10}{7}\]
D.	\[\frac{-7}{10}\]
Answer» D. \[\frac{-7}{10}\]

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If the lines \[\frac{x-1}{-3}=\frac{y-2}{2k}=\frac{z-3}{2}\], \[\frac{x-1}{3k}=\frac{y-5}{1}=\frac{z-6}{-5}\] are at right angles, then k = [MP PET 1997, 2001]

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