IKMC 2024 - Grades 5-6 - Set 2 - Self-study Question 22

Question 22

Four rectangles fit together as shown. The labelled areas are 45, 40 and 48 square centimetres; the marked lengths are 5, 13 and 16 cm. What is the shaded area?

Question illustration

$12\text{ cm}^2$
$14\text{ cm}^2$
$16\text{ cm}^2$
$18\text{ cm}^2$
$20\text{ cm}^2$