Problem description:

1. The bottom of a rectangular wooden box is square, the height of the wooden box is 1.25CM, and the volume is 2. 18M cubic. Find the side length of the bottom of the wooden box.

2. Given that the side length of a cube is 7CM, we can make another cube, and its volume is 8 times that of the original cube. Find the side length of the new cube.

Xiaoming bought a lot of things in the supermarket, and finally he had 2 yuan money left. He wants to buy a piece of butter, but there is only enough money left to buy half a piece. So he pointed to the square butter and said to the salesman, "Please give us half a square butter." The salesman pursed his lips and said, "I can't cut it."

Analysis:

1, h = 0.0125m, v = 2.18m3, s =174.4m 2. Because the bottom is square, the side length of the bottom is a =13.2.

2, V = 8V, A 3 = 8 * A 3, so A=2a= 14cm.

3. Let the original side length of butter be A and the lower side length be A, then V=2v, that is, A 3 = 2 * V 3, as long as about 4/5 of the original side length is cut off.