If the height of a cuboid is increased by 3 cm, it will become a cube. At this time, the surface area is increased by 96 square cm. What is the volume of the original cuboid?

The area of one additional face: 96 △ 4 = 24 (square centimeter); the length (width) of the cuboid: 24 △ 3 = 8 (centimeter); the height of the cuboid: 8-3 = 5 (centimeter); the volume: 8 × 8 × 5 = 320 (cubic centimeter); a: the volume of the cuboid is 320 cubic centimeter

A square metal block with each side of 0.1 m long weighs 100 N and is placed in the center of a horizontal table with an area of 1 m3. How much pressure does the metal block exert on the table

P=F/S＝100N/（0.1m*0.1m)=10000N/m^2=10000Pa

A square metal block with a side length of 0.1 M, weighing 100 N, is placed in the center of a horizontal table top of 1 m3. How much pressure does the metal block exert on the table top?

100/(0.1*0.1)=10000pa

Divide a circle into several small sectors, and then form an approximate rectangle. The circumference of the rectangle is 24.84 cm, and the area of the circle is () square cm
A. 56.52B. 1413C. 28.26D. 2826

Let the radius of a circle be xcm. & nbsp; & nbsp; 3.14 × 2x + 2x = 24.84, 2x × (3.14 + 1) = 24.84 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2x × 4.14 = 24.84, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 8.28x = 24.84, & nbsp; & nbsp; & nbsp; 8.28x △

Divide a circle with a radius of 1 decimeter into several equal parts, cut it open and form an approximate rectangle. What's the circumference of the rectangle? I want it today! Please help me!

Diameter: 1 + 1 = 2 decimeters, circumference of circle: 2 * 3.14 = 6.28 decimeters, approximate rectangle has two more radii than circle, that is, circumference of rectangle with one diameter: 6.28 + 2 = 8.28 decimeters

Divide a circle with a radius of 1 decimeter into several parts, cut it open and form an approximate rectangle. The circumference of the rectangle is () decimeter
A. 14.56B. 10.28C. 15.43D. 8.28

Rectangle length: 2 × 3.14 × 1 △ 2, = 6.28 △ 2, = 3.14 (decimeter); rectangle width = 1 decimeter; rectangle perimeter: (3.14 + 1) × 2, = 4.14 × 2, = 8.28 (decimeter); answer: the rectangle perimeter is 8.28 decimeter

The area of a square is 16 square centimeters. If its side length is increased by four times, the area becomes () square centimeters

If it's four times longer, it's 256 square centimeters
You can ask me if you don't understand my answer!

A square paper is a centimeter long. Fold it into two identical rectangles. The circumference of each rectangle is Cm, the area is Square centimeter

(a + 12a) × 2 = 3A (CM) a × 12a = 12a2 (square cm) a: the circumference of each rectangle is 3A cm and the area is 12a2 square cm

There is a piece of square paper with a side length of 1.5 decimeters. I want to use it to cut a small square with an area of 16 square centimeters. How many pieces can I cut at most?
I also think it's 9, but my son changed the answer to 15 when he went to school. The reason is that four of the six students in their group wrote 15. Now I take the exercise book home and I have a ditch. Then I feel dizzy!

16=4×4
1.5 decimeter = 15 cm
15 △ 4 = 3 (pieces) 3 (CM)
3 × 3 = 9

A piece of square paper, after the side length is reduced by 4cm, the area is reduced by 120cm. What is the area of the original square?
What's the formula

Let the side length be a
A×A-（A-4)(A-4)=120
A=17
Original area = 17 × 17 = 289

If the height of a cuboid is increased by 3 cm, it will become a cube. At this time, the surface area is increased by 96 square cm. What is the volume of the original cuboid?