UKMT Pink Kangaroo, 2020

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

Two identical rectangles with sides of length $3$ cm and $9$ cm are overlapping as in the diagram. What is the area of the overlap of the two rectangles?

(A) $12 \text{ cm}^2$ (B) $13.5 \text{ cm}^2$ (C) $14 \text{ cm}^2$ (D) $15 \text{ cm}^2$ (E) $16 \text{ cm}^2$

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