How to do this question, please help answer it

Fat, happy, sweet, smiling, bare, shiny, cold.

Clean, careful, diligent, bumpy, up and down, serious.

Heavy, golden, smiling.

Bright, watery, green, happy, happy, and many.

Let's start with the conditions given in the title:

The sum of the edges and lengths of the cuboid is 120 cm. We know that a cube has 12 edges, and after the three cubes are put together into a cuboid, there are 20 edges, if you can't imagine it, you can see Figure 2.

The assembled cuboid is 18 cm long, 6 cm wide and 6 cm high.

Solution: 120 20 = 6 cm.

18*6*6=648 cubic centimeters.

Answer: The volume is 648 cubic centimeters.

Figure 1 (forgive me for the hard drawing).

Figure 2

Solution: Let the side length of the small cube be x, then there is 4(3x+2x)=120 to solve the equation to obtain: x=6 (cm).

Then the volume of the cuboid is: 3*6*6*6=648 (cubic centimeters) Answer: The volume of the cuboid is 648 cubic centimeters.

How many sides does a box have, and how long is each side? It adds up to 120, is the side and height equal, and is the long edge triple the side? Is the formula for the volume of a box multiplied by the base area? It's not difficult to draw a picture. Don't be opportunistic.

The sum of the surface area of the two divided cuboids is equal to the surface area of the original cuboid, plus 2 times the area of the cutting surface, so to maximize the sum of the surface area, you only need to find the largest area of the cutting surface, find the two largest length, width, and height (such as length and width), and then cut along the parallel face.

First of all, understand that the edges of the cube are all the same, and there are 12 edges in total. Suppose the edge length is x, and the sum of the edge lengths is 12x.

Now the edge length is increased by 2 times, which is x+2x=3x, which is 3 times the original length. (According to the title, if this means to increase to 2 times, it is the original 2 times).

Then the sum of the edge lengths should be 12*3x=3*(12x). Therefore, the sum of the edge lengths is 3 times the original.

This problem is very simple, since it is to sum the edge length of the cube, you can set the original edge length to a, the sum of the edge length of the original cube is 12a, and the edge length is increased by 2 times, and the answer is 2 12a = 24aHope!!!

Because the sum of the edges of the cube is 4a, the expansion of 2 times is 3 times of the original, so the sum of the edges is 4 3a = 12a, which is 2 times larger.

Assuming that the primary edge length is a, and the edge length is increased by 2 times, the edge length becomes 3a and a 12=12a

Increase the length of the trailing edge and 3a 12=36a

Increasing the sum of the length of the rear edge is several times the length of the original edge: 36a 12a = 3, so increasing the length of the rear edge and increasing the sum of the length of the original edge is 2 times that of the original edge, 3-1 = 2

All edges of the cube are the same length, so it is 2 times.

There is a key number in your ** middle question bent pants that I didn't shoot, see the key blind below.

What is the height of the buried light on the water surface? Centimeter.

Because the upper and lower levels of the water rose to 20 centimeters in the early years, it rose by 20-14 = 6 centimeters, so the volume of the iron block was 50 40 6 = 12,000 cubic centimeters, and the height was 12,000 (40 25) = 12 centimeters.

<> first select one person as the leader of the team, and the remaining three people in the circle will choose one person as the deputy leader, so that there are 3 combinations and collocations.

Sorry, the test failed, I don't know what you asked.

Bright and 5 10

m) There are about meters in each step of the Minor.

2), slag key royal.

m) The distance between the north and south of the living room of Xiaoya's house is about meters.

980 such as rock step).

Xiao Ya walked 2,000 steps to the school.

Because the surface of the water rises to 20 centimeters, it rises by 20-14 = 6 centimeters, so the volume of the iron block is 50 40 6 = 12,000 cubic centimeters, and the height is 12,000 (40 25) = 12 centimeters.

Answer: The first question: After walking 10 steps, the results of 5 measurements are: meters, meters, meters, meters, meters.

The average is found as:

Rice. Meter 10 steps = meter steps.

Question 2: Walked 20 steps, with an average of meters per step.

So the distance is: 20*m.

Question 3: Walked 980 meters, an average of one meter per step.

Walked a total of 980 steps.

Hope it works for you.

m) There are about meters in each step of the Minor.

m) The distance between the north and south of the living room of Xiaoya's house is about meters.

980 steps).

Xiao Ya walked 2,000 steps to the school.

Because it was measured 5 times, it was necessary to take the average of 5 times, that is, (. So the stride length is meters. The length of the living room is meters. It's 980 steps from home to school.

5760 (3200 5) = 5760 640 = 9 (sets) Answer: 9 such machines can weave 5760 meters a day 2(3200 5) x (5 + 3) = 640 x 8 = 5120 (m.)

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