BBB 2022 - Grade 5 - Preliminary Round Question 18

Question 18

Given triangle ABC with area $200\mathrm{cm}^2$. Put point M and N on line segment AB and AC respectively such that $AM=MB$ and $NC=2\times AN$. Find the area of the shaded region.

Question illustration

$20\mathrm{cm}^2$
$25\mathrm{cm}^2$
$33\mathrm{cm}^2$
$16\mathrm{cm}^2$