A point R with x-coordinates 4 lies on t...

A point `R` with x-coordinates 4 lies on the line segment joining the points `P(2,-3,4)a n d\ Q(8,0, 10)dot` Find the coordinates of the point `Rdot`

A

`2sqrt14`

B

`2sqrt21`

C

`6`

D

`sqrt53`

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The correct Answer is:

B

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