A 40 cm long, 20 cm wide and 30 cm high cuboid glass jar is 18 cm deep. Now an iron ball is completely immersed in the water, and the water surface rises to 25%

Volume of iron ball 40 * 20 * (25-18) = 5600 cm3

In a cuboid glass jar which is 6 decimeters long, 4 decimeters wide and 3 decimeters high, the water depth is 2 decimeters. Put a solid iron ball into the water completely, and the water depth becomes 2
After the title: find the volume of the iron ball

6 * 4 * (2.5-2) = 12 square decimeters

Two English expressions of time: 1:45, 1:55, 12:30, 5:15 And 6:35

1:45: a quarter to two / one forty-five
1:55: five to two / one fifty-five
12:30: half past twelve / twelve thirty
5:15: a quarter past five / five fifteen
6:35: twenty-five to seven / six thirty-five

5x = 25 × 4-15x to solve the equation

5x+15x=25×4
20x=100
x=5

Through this literary exchange activity, students understand that to write a good composition, we must observe and feel the philosophy of life
Fill in the blanks; everything is just like waking up, open your eyes happily

Through this literary exchange activity, students understand that to write a good composition, we must observe life and feel the philosophy of life
The mountain rose, the water grew, and the sun blushed

How many kilometers is 200 meters equivalent to the simplest fraction

1 / 5km

6 / 13 + 9 / 13 + 13 / 9 + 11 / 13 + 5-9

Add the first, second and fourth items to get two, then add the last two items to get - 2, and then add 13 / 9 to get - 5 / 9

Answer in a minute
If the length of a rectangular block is reduced by 2cm, it becomes a cube block. The surface area of the cube block is 96cm2. What is the volume of the original cube block?
To have a detailed reason, it is best to use the formula!

The surface area of each surface of the cube is 96 / 6 = 16 square centimeters;
The side length of the cube is 4cm,
So the cuboid is 6 cm long, 4 cm wide, 4 cm high, and its volume is 6 * 4 * 4 = 96 cubic cm

If the natural number n can be expressed as the sum of three continuous natural numbers, 11 natural numbers and 12 continuous natural numbers,
So what's the number

Suppose that this number is the sum of n natural numbers, and let the smallest number in these continuous numbers be m, then this number can be understood as the sum of the arithmetic sequence with the equal difference of 1, as follows: n = s = (M + m + n-1) n / 2 = nm + (n-1) n / 2 > = (n + 1) n / 2, if n is odd, n must be the divisor of the number; if n is even, N / 2 must be the divisor of the number;
So n must be the common multiple of 3, 11 and 6, and its least common multiple is 66, that is, n must be the multiple of 66, and N ≥ (12 + 1) * 12 / 2 = 78, so n = 66K, (K ∈ natural number, and K ≥ 2)

Xiaohong and Xiaoli play the game of "stone, scissors and cloth". The possibility of Xiaohong winning is (), the possibility of Xiaoli winning is (), and the possibility of even is ()

There are three ways to respond to each method. For example, if a stone is produced, the opponent can produce stone, scissors and cloth. Then there are three ways to win, and there are nine situations in total. Therefore, the possibility of winning, losing and peace is 1 / 2

A 40 cm long, 20 cm wide and 30 cm high cuboid glass jar is 18 cm deep. Now an iron ball is completely immersed in the water, and the water surface rises to 25%