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UKMT Grey Kangaroo, 2018

Geometry Difficulty 2.0 Junior Find the answer United Kingdom

The large rectangle shown is made up of nine identical rectangles whose longest sides are 10 cm long. What is the perimeter of the large rectangle?

(A) $40$ cm (B) $48$ cm (C) $76$ cm (D) $81$ cm (E) $90$ cm

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