4. Rukhsar painted the outside of the cabinet of measure $1 \mathrm{~m} \times 2 \mathrm{~m} \times 1.5 \mathrm{~m}$. How much surface area did she cover if she painted all except the bottom of the cabinet
Required area = Total area - Area of bottom surface
Total area $=2(1 \times 2+2 \times 1.5+1.5 \times 1)=13 \mathrm{~m}^2$
Area of bottom surface $=1 \times 2=2 \mathrm{~m}^2$
So required area $=13-2 \mathrm{~m}^2=11 \mathrm{~m}^2$