IKMC 2007 - Grades 5-6 - Self-study Question 12

Question 12

Two 9 cm × 9 cm squares overlap to form a 9 cm × 13 cm rectangle as shown. Find the area of the region in which the two squares overlap.

Question illustration

$36\text{ cm}^2$
$45\text{ cm}^2$
$54\text{ cm}^2$
$63\text{ cm}^2$