CEMC Cayley, 2009

Geometry Difficulty 3.0 AMC 10/12 Find the answer Canada

Rectangle $PQRS$ is divided into eight squares, as shown. The side length of each shaded square is 10. What is the length of the side of the largest square?

(A) $18$ (B) $24$ (C) $16$ (D) $23$ (E) $25$

Figure for this problem

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