The correct answer is: Area of △ABC = 20
Explanation:
Since the area of △AOD = 10; therefore. the area of △BOC is also 10.
Now:
The area of △ABC = Area of △AOB + Area of △BOC --- (1)
Since Area of △AOB = [tex] \frac{1}{2} [/tex] (Area of △ABC) --- (2)
Plug (2) in (1):
(1) => Area of △ABC = [tex] \frac{1}{2} [/tex] (Area of △ABC) + 10
=> [tex] \frac{1}{2} [/tex] (Area of △ABC) = 10
=> (Area of △ABC) = 20
-i
