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Pour water from a cold water with a bottom radius of 10 cm into an empty glass with a bottom radius of 5 cm and a height of 8 cm. When the glass is full, the water surface of the cold water cup will drop
Let's go down by xcm
10*10x*π=5*5*8*π
100x=20
x=2
A: it dropped by 2cm
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The surface area of a cuboid is 130 square centimeters, the perimeter of its bottom is 18 cm, and its height is 5 cm. What is the cuboid's volume in cubic centimeters?
Let the length of the bottom be x and the width be y,
We have X + y = 9,
2(5x+xy+5y)=130,
If we solve the quadratic equation of two variables, we can get x = 4, y = 5 or x = 5, y = 4,
Therefore, the volume v = 4 * 5 * 5 = 100
A cuboid has a bottom area of 42 square centimeters, a bottom perimeter of 26 centimeters and a height of 5 centimeters. The surface area of the cuboid is______ Square centimeter
42 × 2 + 26 × 5, = 84 + 130, = 214 (square centimeter); answer: the surface area of this cuboid is 214 square centimeter
The surface product of a cuboid is 40cm & # 178;, which is divided evenly into two identical cubes. The surface area of each cube is ()
The volume of the whole cuboid is ()
The surface product of a cuboid is 40cm and 178; and it is evenly divided into two identical cubes. The surface area of each cube is (24cm 2) and the volume of the whole cuboid is (16cm 3)
The area of one surface of cube is 40 (6 × 2-2) = 4 square centimeter
The surface area of cube is 4 × 6 = 24 square centimeter
The length of the cube is 2 cm
Cuboid Volume 2 × 2 × 2 = 16 cubic centimeter
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