(1) The existing water is 6000 kg, and the preparation of this pesticide requires 12 kg powder.

(2) The existing powder is 3.6 kg, and the preparation of this pesticide requires 1800 kg of water.

For two cuboids with equal base areas, the height ratio of the first cuboid to the second cuboid is 7: 1 1, and the second cuboid is

The volume of a cuboid is 144 cubic decimeter, and the volume of the first cuboid is1008/1cubic decimeter.

A belt drives two wheels, the diameter of the big wheel is 30 cm, and the diameter of the small wheel is 10 cm; The small wheel turns 300 revolutions per minute, and the big wheel turns 900 revolutions per minute.

A project, if 34 people work for 20 days, how many workers do you need to finish it three days ahead of schedule now?

A hall, paved with square bricks with a side length of 6 minutes, needs 324 pieces; If you change the square brick with a side length of 4 mm, you need to use more bricks.