After sawing a 2-meter-long cuboid into two sections, its surface area increases by 100 square centimeters, and its volume is () A.100 cubic centimeters After sawing a 2-meter-long cuboid into two sections, its surface area increases by 100 square centimeters, and its volume is () A. 100 cc b.200 CC C. 10000 cm3 D.2 DM3

C. Because there are two more surfaces on the surface, the average surface area is 50 square centimeters
Volume is equal to the bottom area multiplied by height, 2 meters is equal to 200 centimeters, multiplied by 50 square centimeters is equal to 10000 cubic centimeters!

A cylindrical wood bottom diameter is 10 cm, height is 30 cm, cut it into a largest cuboid, the cuboid volume is how many cubic centimeters? Detailed process!

Maximum cuboid height = 30cm, the largest square at the bottom is the inscribed square at the bottom of the cylinder
Diagonal = 10 cm
Bottom area = 10 * 10 / 2 = 50 square centimeter
Volume = 50 * 30 = 1500 cc

A section of cuboid wood is 1 meter long. If it is sawn off by 2 cm, its volume will be reduced by 20 cubic cm. What is the original volume of this section of wood

20÷2=10c㎡
1m=100cm
100 * 10 = 1000 CC
A: the original volume of this section of wood is 1000 cubic centimeters

1+2+3+4+5+6+7+8+9+10+11+12+13+14+.+98+99+100
Big brother. Big sister will help me

(1+100)×100÷2＝5050
The famous Gauss formula: (first term + last term) × number of terms △ 2

1. System of inequalities - 3

As shown in the figure, in the isosceles trapezoid ABCD, ad ‖ BC, point E is the point on the BC extension line, and CE = ad. please judge the shape of the triangle DBE

Isosceles triangle
Because ad is parallel to BC, ad = CE, so AC is parallel to de, because isosceles trapezoid, AC = BD, so BD = De
It is an isosceles triangle

1、 Write the number two directly, calculate (all are fractions)
Note: (denominator before, numerator after)
1、 Number written directly
4 / 3 * 12 = 7 / 5 + 7 / 2 = 3 / 2 * 4 / 3 = 60 * 12 / 5 = 8 / 7-4 / 3 = 10 / 1 * 1 and 4 / 1 = 9 / 2 * 1 and 5 / 1 = 7 / 5 * 5 / 14=
2、 Calculation
2 and 2 / 1 * 15 / 1 + 3 / 1 * 2 / 1 (3 / 2 + 1 and 5 / 2) * 7 / 5 (4 / 3 + 3 / 2) * 1 and 7 / 1 7 and 4 / 3-1.25 + 2 and 5 / 1 (1 and 8 / 1 + 4 / 1) + 2 and 3 / 1
(9 / 1 + 6 / 1) * 1 and 5 / 1
It's due in the afternoon,

Hello, the correct way to write is that the numerator is in the front and the denominator is in the back. It's almost the same. It's crossover simplification. If it can't be simplified, the numerator multiplies the numerator and the denominator multiplies the denominator. 3 / 4 * 12 5 / 7 + 2 / 7 2 / 3 * 3 / 4 60 * 5 / 12 7 / 8-3 / 4 1 / 10 * 1 and 1 / 4 = 3 * 3

Why is the function y = 2x + 1 not odd or even?

A: when you make an image of a function, you will find that the image of the function is neither symmetrical about the Y axis nor about the origin,
That is to say, the function y = 2x + 1 is not odd or even

The circumference of a circle is 37.68dm, and the radius of the circle is () DM. Draw the largest square in the circle, and the area of the square is () square decimeter

The radius of the circle is (6) DM
6*2=12
12*6/2=36
36*2=72

1 nm (nanometer) = how many cm

One nanometer is 10 to the - 9th power meter, multiplied by 100 is 10 to the - 7th power centimeter