Bunuel wrote:

P is a point (not shown in the figure) in the plane containing O, R, and Q where O is the center of the circle and R and Q are points on the circle. If r is the radius of the circle, is P inside the circle?
(1) PR > PO
(2) PR + PQ = 5r
DS21262
(1) PR > PO
Consider point P in the top half of the circle somewhere. PR > PO.
Now move the point P vertically up outside the circle. Still PR > PO.
So P may be inside or outside the circle - not sufficient
(2) PR + PQ = 5r
If two points are inside or at the circle, maximum distance between them will be 2r (the diameter). For any points Q and R on the circle, the maximum sum of distance of P from Q and R will be 2 * 2r = 4r.
If the sum of the distances is 5r, P MUST be outside the circle.
Sufficient
Answer (B)
_________________
Karishma
Owner of Angles and Arguments
https://anglesandarguments.com/
For Individual GMAT Study Modules, check Study Modules >
For Private Tutoring, check Private Tutoring >