1. 6 points (1) a batch of parts were produced, 200 pieces per day, completed in 15 days. In fact, 250 pieces per day were produced. How many days can they be completed? (expressed in proportion) (2) a cone-shaped sand pile has a bottom area of 18.84 square meters and a height of 0.5 meters. If the sand weight per cubic meter is 1.6 tons, how many tons does the pile weigh? (3) if a cylinder and a cone are of equal height and equal bottom, and the volume of the cylinder is 120 cubic centimeters, how many cubic centimeters more is the volume of the cylinder than that of the cone? 2. The tractor factory produced 850 large tractors in the first three months of this year. According to this calculation, how many tractors can be produced in the whole year? (answer to the same proportion method) (5 points) 3. The utility model relates to a cylindrical tin bucket without a cover, with a bottom diameter of 4 decimeters and a height of 6 decimeters? 4. A room, with the side length of 2 decimeters of floor tiles, need to use 144 pieces, if use the side length of 3 decimeters of floor tiles, how many pieces? 5. A cylindrical iron block with a bottom radius of 4 decimeters and a height of 6 decimeters is melted and cast into a cylinder with a bottom radius of 3 decimeters What's the height of this cone? 6. After a basket of apples is sold, another 6 kg is sold. At this time, the weight sold is just the rest. How many kg is the basket of apples? (4 points) 7. A rectangular block of wood, 8 in width and 6 in height, is cut into the largest cylinder. What is the volume of this cylinder in cubic decimeters? (3 points)

1. 6 points (1) a batch of parts were produced, 200 pieces per day, completed in 15 days. In fact, 250 pieces per day were produced. How many days can they be completed? (expressed in proportion) (2) a cone-shaped sand pile has a bottom area of 18.84 square meters and a height of 0.5 meters. If the sand weight per cubic meter is 1.6 tons, how many tons does the pile weigh? (3) if a cylinder and a cone are of equal height and equal bottom, and the volume of the cylinder is 120 cubic centimeters, how many cubic centimeters more is the volume of the cylinder than that of the cone? 2. The tractor factory produced 850 large tractors in the first three months of this year. According to this calculation, how many tractors can be produced in the whole year? (answer to the same proportion method) (5 points) 3. The utility model relates to a cylindrical tin bucket without a cover, with a bottom diameter of 4 decimeters and a height of 6 decimeters? 4. A room, with the side length of 2 decimeters of floor tiles, need to use 144 pieces, if use the side length of 3 decimeters of floor tiles, how many pieces? 5. A cylindrical iron block with a bottom radius of 4 decimeters and a height of 6 decimeters is melted and cast into a cylinder with a bottom radius of 3 decimeters What's the height of this cone? 6. After a basket of apples is sold, another 6 kg is sold. At this time, the weight sold is just the rest. How many kg is the basket of apples? (4 points) 7. A rectangular block of wood, 8 in width and 6 in height, is cut into the largest cylinder. What is the volume of this cylinder in cubic decimeters? (3 points)

(2) 1.6 × (1 / 3 × 18.84 × 0.5) (3) the volume of a cone is one third of the volume of a cylinder (1 - 1 / 3) × 1202 12 months of a year 850 × 4 or 850 ／ 3 = x ／ 12 calculate x = 34003