1. The volume of a room is 80 m³. The area of the floor is 20 m². The height of the room is

2. The floor of a room is a square of side 6 m. Its height is 4 m. The volume of the room is

3. The heights of two right circular cylinders are the same. Their volumes are respectively 16π m³ and 81π m³. The ratio of their base radii is

4. The ratio of the radii of two right circular cylinders is 1 : 2 and the ratio of their heights is 4 : 1. The ratio of their volumes is

5. A glass in the form of a right circular cylinder is half full of water. Its base radius is 3 cm and height is 8 cm. The volume of water is

6. A cuboid has ______ pairs of identical faces.

7. All six faces of a cube are:

8. A cylindrical box has ____ curved surface and ____ circular faces, which are identical.

9. The diagram has the shape of a

10. The diagram has the shape of a