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The length of the perpendicular drawn...

The length of the perpendicular drawn from `(1,2,3)` to the line `(x-6)/3=(y-7)/2=(z-7)/(-2)` is a. `4` b. `5` c. `6` d. `7`

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If the length of the perpendicular drawn from (1,2,3) to the line (x-6)/(3)=(y-7)/(2)=(z-7)/(-2) is K units, then the value of K is -

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