1. Cuboid is a three-dimensional figure surrounded by _ _ rectangles with _ _ vertices; There are _ _ tendons, the relative area is _ _ _ _ _ _ _, and the length of the tendons is _ _ _ _ _ _ _ _ _ _ _.

2. The length of three sides intersecting at a vertex is called _ _ _ _ _ _ _ of a cuboid.

3. Cubes are also called _ _ _ _ _. It has _ _ _ _ faces, and each face has _ _ _ _ shapes. It has _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

2. Apply the problem (write the formula)

1. There are 3600 wooden floors in the school meeting room, which are 50 cm long, 20 cm wide and 2 cm thick. What is the area of this conference room?

2. Jam 10 bottles, of which 9 bottles have the same quality, and 1 bottle is slightly weak. How many times can I find this lighter bottle of jam at least? What if it is 1 1 bottle?

A swimming pool is 50m long, 30m wide and 2m deep. Cover the bottom and walls of the swimming pool with cement. According to experience, it usually needs to be wiped twice. The first plastering requires 0.6 kg of cement per square meter, and the second plastering requires 2/3 of the first plastering. How many kilograms of cement do you need?