AMO 2027 Grades 2-3 SET 15 - Self-study Question 11

Fiona has 12 identical rectangles of size 3 cm × 9 cm. She arranged these rectangles (with no overlapping parts) and formed a square. What is the perimeter, in centimeters, of the square she get?



Self-study input (editorial): the rectangles tile the square without gaps; enter its outer perimeter in centimeters.