Q. 75.0( 1 Vote )

Let (3, 4, -1) an A. 2

B. 3

C. 6

B. 7

Answer :

Given: P(3, 4, -1) and Q(-1, 2, 3) represents diameter of sphere


To find: Radius of the sphere


Formula used:


The distance between any two points (a, b, c) and (m, n, o) is given by,



Therefore,


Distance between P(3, 4, -1) and Q(-1, 2, 3), PQ is






= 6


So, Diameter = 6


We know that Diameter = 2 Radius




Hence, Radius of the sphere is 3 units

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