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UKMT Intermediate Mathematical Challenge, 2024

Geometry Difficulty 1.0 Junior Find the answer United Kingdom

A picture, together with its frame, makes a square of side-length $80$ cm. The frame is $4$ cm wide. What percentage of the area of the square is covered by the frame?

(A) $15\%$ (B) $18\%$ (C) $19\%$ (D) $20\%$ (E) $24\%$

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