VTMO 2026 - Grade 8 - Semifinal - SET 10 - Self-study Question 10

Question 10

The diagram is the floor plan of a room. Adjacent walls are perpendicular. The marked lengths are $a,b$. What is the area of the room?

Question illustration

$2ab+a(b-a)$
$3a(a+b)-a^2$
$3a(b-a)+a^2$
$3ab$
$2(a^2+ab)$