IKMC 2027 - Grades 7-8 - Self-study SET 1 - Thematic Batch 3 Question 16

Rectangle $ABCD$ is formed from smaller rectangles. Its perimeter is 90 m. What is the area, in square metres, of each small rectangle?

Editorial note: The intended interpretation is that the small rectangles are congruent; this condition is not stated explicitly in the source.