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UKMT Intermediate Mathematical Challenge, 2020

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

Triangle $PQR$ has been divided into twenty-five congruent right-angled triangles, as shown. The length of $RP$ is $2.4$ cm. What is the length of $PQ$ ?

(A) $3$ cm (B) $3.2$ cm (C) $3.6$ cm (D) $4$ cm (E) $4.8$ cm

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