1. How long does it take to make 10 8 cm long cubic iron frames?

2. Make an iron box with iron sheet so that its length, width and height are 1.8 decimeter, 1.5 decimeter and 1.2 decimeter respectively. How many square meters does it take to make such an iron box?

3. How many square meters of glass does it take to make a 3-minute uncovered cube glass fish tank?

Our school will paint the classroom, which is 8 meters long, 7 meters wide and 3 meters high. After deducting the area of doors, windows and blackboards, it is known that 5 yuan painting costs per square meter. How much does it cost to paint a classroom?

A commodity box is a cube with a side length of 6 cm. What is the maximum area of a box with a trademark?

6. The length, width and height of woodcut are 2.8 decimeters, 1.5 decimeters and 2.2 decimeters respectively. How many square meters of wood carving does it take to make five such drawers?

7. There is a fish pond with a length of 18m, a width of 12m and a depth of 3.5m Cement should be coated around the fish pond to prevent water seepage. If 5 kilograms of cement is used per square meter, how many kilograms of cement does a * * need?

8. The processing factory will process a batch of TV sets. (No bottom) Each TV is 60 cm long, 50 cm wide and 55 cm high. How many square meters of cloth does it take to make 1000 sets?

9.24 rectangular iron chimneys, each 2m long, 4m wide and 3m high. How many square meters of iron do you need?

10, rectangular goldfish bowl, 8 cm long, 5 cm wide and 6 cm high. Accidentally broke the front glass, and the matching area of the glass during maintenance was ().