P, Q, R and S are the points on the circ...

P, Q, R and S are the points on the circumference of a circle of radius r, such that PQR is an equilateral triangle and PS is a diameter of circle. What is the perimeter of the quadrilateral PQSR?

A

`2r(1+sqrt(3))`

B

`2r(2+sqrt(3))`

C

`r(1+sqrt(3))`

D

`2r+sqrt(3)`

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