CAYLEY 2005 Problem 22

Past Contests CAYLEY CAYLEY - 2005
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1

In the diagram, AOB is a quarter circle of radius 10 and PQRO is a rectangle of perimeter 26. The perimeter of the shaded region is

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Answer Choices
A. 7+5\pi
B. 13+5\pi
C. 17+5\pi
D. 7+25\pi
E. 17+25\pi