2. Machine tool factory used to know that each machine tool used steel 1.02 tons. After the improved design, each machine tool saves 0.65,438+0.2 tons compared with the original machine tool. How many machine tools can it make now?
The warehouse stores rice and flour. It is known that the stored flour is 4500 kilograms more than rice, and the stored flour is three times more than rice, 700 kilograms. How many kilograms of rice and flour are stored in the warehouse?
4. One room 1200 The wooden floor is 40cm long, 20cm wide and 2cm thick. How many square meters does this room occupy? How many cubic meters of wood does it take to spread out this room?
A cubic water tank with a side length of 8 decimeters can hold 490 liters of water. Pour water into a cuboid water tank with a length of 10 decimeter, a width of 7 decimeters and a height of 8 decimeters. What is the depth of the water tank?
6. A cuboid water tank with no cover was made by the White Iron Products Factory, which was 3 cm long, 0/.5 cm wide and 2 cm high. How many square decimetres of tinplate does it take to make 100 such water tanks?
7. Two cars, A and B, are driving in opposite directions from A and B at the same time. Car A travels 40 kilometers per hour and car B travels 35 kilometers per hour. The two cars meet at a distance of15km. How many kilometers is it between A and B?
8. 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?
9. Two engineering teams open1500m tunnel at the same time. Construction team A starts from one end and digs 14m every day. Construction team B starts from the other end and digs 16m every day. How many days can the tunnel be dug?
10. Xinhua Bookstore transported 5,250 books of literature and art science and technology to the countryside, including 25 packages of literature and art books and 80 packages of science and technology books, each with the same number of books. How many books are there in each package? How many books are there in science and technology and literature and art respectively?