Let (3,4,-1) and (-1,2,3) be the end points of  diameter of a sphere. Then the radius of the sphere is equal to a. 2                  b.  3                c. 6           d. 7

Explanation

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,


`sqrt[ ( a − m )^2 + ( b − n )^2 + ( c − o )^2]`


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