VTMO 2014 — Grade 6 — semifinal Question 15

Question 15

Rectangle $ABCD$ has perimeter $240 \,\mathrm{cm} , AB = 40 \,\mathrm{cm}$. Find the illustrated shaded area.

1. $1000 \,\mathrm{cm}^{2}$
2. $1600 \,\mathrm{cm}^{2}$
3. $2000 \,\mathrm{cm}^{2}$
4. $3200 \,\mathrm{cm}^{2}$
5. $4000 \,\mathrm{cm}^{2}$