1. The perimeter of the figure is

2. The area of the figure is

3. The area of the figure is

4. The area of the trapezium is

5. The area of the trapezium is

6. The perimeter of the trapezium is

7. The area of the quadrilateral is

8. The area of the quadrilateral is

9. The area of the quadrilateral is

10. 8 persons can stay in a cubical room. Each person requires 27 m³ of air. The side of the cube is