1.

In the tetrahedron ABCD, A = (1, 2, -3) and G(-3, 4, 5) is the centroid of the tetrahedron. If P is the centroid of the DeltaBCD then AP =

Answer»

`(8sqrt(21))/(3)`
`(4sqrt(21))/(3)`
`4sqrt(21)`
`(SQRT(21))/(3)`

ANSWER :a


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