What is the formula for calculating the volume of a cylinder? At which grade is this formula taught in Vietnam?

Below are the formula for calculating the volume of a cylinder and some examples.

What is the formula for calculating the volume of a cylinder?

The current formula for calculating the volume of a cylinder is as follows:

Formula to Calculate the Volume of a Cylinder

V = π(Pi)r²h

Volume of a Cylinder

*Where:

V: Volume of the cylinder

π: Pi (approximately equal to 3.14)

r: Radius of the base of the cylinder

h: Height of the cylinder

*Explanation:

πr²: This is the formula to calculate the area of the circular base.

πr²h: When the base area is multiplied by the height, we get the volume of the cylinder, which is the entire space that the cylinder occupies.

*Example:

A cylinder has a base radius of 5cm and a height of 10cm. Calculate the volume of this cylinder.

Solution:

Using the formula: V = πr²h

Substitute the values: V = 3.14 x 5² x 10 = 785 cm³

Therefore, the volume of the cylinder is 785 cm³.

*Note:

- The unit of volume is typically cm³, m³, dm³, etc., depending on the units of the radius and height.

- For accurate calculations, you should use a more precise value of π with a calculator or take π ≈ 3.14.

Some Example Exercises for Practice:

Simple Problem

A cylinder has a base radius of 3cm and a height of 10cm. Calculate the volume of this cylinder.

A cylindrical water pipe has a base diameter of 20cm and a height of 1.5m. Calculate the volume of water that the pipe can fully contain.

Advanced Problem

A cylindrical fish tank has a base diameter of 80cm and a height of 50cm. If the tank is filled with water, how many liters of water does it hold? (1dm³ = 1 liter)

A cylindrical pencil case has a base diameter of 6cm and a height of 20cm.

Calculate the volume of the pencil case.

If each pencil has a volume of 2cm³, how many pencils can the case hold at most?

Comprehensive Problem

A cylinder has a lateral surface area of 120π cm² and a height of 10cm. Calculate the volume of this cylinder.

A cylinder has a volume of 500π cm³ and a base radius of 5cm. Calculate the height of this cylinder.

*Solution Hints:

Step 1: Identify the known quantities: base radius (r), height (h).

Step 2: Apply the formula: V = πr²h

Step 3: Substitute the values into the formula and calculate.

Step 4: Write the result with the appropriate unit of measurement.

*Note:

π: You can take the approximate value of π as 3.14 or use the π button on a calculator.

Unit of measurement: Pay attention to the units of measurement of the quantities to give an accurate result.

*Note: Information is for reference only./.

Formula for Calculating the Volume of a Cylinder? What grade is this formula taught in?

What is the formula for calculating the volume of a cylinder? At which grade is this formula taught in Vietnam?​ (Image from the Internet)

At what grade in Vietnam is the formula for calculating the volume of a cylinder taught?

According to Section V Appendix Mathematics Curriculum of General Education Program issued together with Circular 32/2018/TT-BGDDT:

A cylinder is one of the geometric shapes that students are introduced to and become familiar within the grade 5 mathematics syllabus.

Furthermore, the formula for calculating the volume of a cylinder is one of the contents students will learn when they reach grade 9. (**Section V Appendix Mathematics Curriculum of General Education Program issued together with Circular 32/2018/TT-BGDDT).

Specifically, in the Visual Geometry section, the lesson on Cylinders, Cones, and Spheres will cover contents such as:

- Describing (generatrix, height, base radius) and constructing a cylinder.

- Describing (apex, generatrix, height, base radius) and constructing a cone.

- Describing (center, radius) and constructing a sphere, surface of the sphere. Recognizing the intersections of a plane and the sphere.

- Calculating the lateral surface area of a cylinder, cone, and the surface area of a sphere.

- Calculating the volume of a cylinder, cone, and sphere.

- Solving some practical problems related to calculating the lateral surface area and volume of cylinders, cones, and spheres (e.g., calculating the volume or lateral surface area of some familiar objects shaped like cylinders, cones, spheres, etc.).

Thus, the formula for calculating the volume of a cylinder is taught in the grade 9 syllabus.

What are the objectives required for grade 12 Mathematics in Vietnam?

According to sub-section 3 Section III Mathematics Curriculum of General Education Program issued together with Circular 32/2018/TT-BGDDT, the assessment of grade 12 Mathematics will adhere to the following guidelines:

The high school mathematics education aims to help students achieve the following primary objectives:

- Contribute to the formation and development of mathematical competence with the following required capabilities:

+ Pose and answer questions when reasoning, solving problems; use argumentation, induction and deduction methods to understand different methods in problem-solving; establish mathematical models to describe situations, thus proposing solutions to the mathematical problems posed in the established models;

+ Execute and present solutions to problems and evaluate the performed solutions, reflect the value of the solutions, generalize for similar problems;

+ Utilize mathematical tools and means in learning, discovery, and solving mathematical problems.

- Possess basic, essential mathematical knowledge and skills about:

+ Algebra and some analytic elements: Calculation and using calculation tools; using algebraic language and notations; transforming algebraic and transcendental expressions (trigonometric, exponential, logarithmic), equations, systems of equations, inequalities; recognizing basic elementary functions (power, trigonometric, exponential, logarithmic); examining functions and drawing function graphs using differential tools; using function language, function graphs to describe and analyze some processes and phenomena in the real world; using integrals to calculate the area of flat shapes and the volume of three-dimensional objects in space.

+ Geometry and Measurement: Provide knowledge and skills (at the level of logical reasoning) about geometric relationships and familiar flat and three-dimensional shapes; algebraic methods (vectors, coordinates) in geometry; developing spatial imagination; solving some simple practical problems related to Geometry and Measurement.

+ Statistics and Probability: Improve the ability to collect, categorize, display, analyze, and process statistical data; use tools to analyze statistical data through characteristic measures of central tendency and measures of dispersion for grouped and ungrouped data; use statistical laws in practice; recognize random models, basic concepts of probability, and the significance of probability in practice.

- Help students have a relatively general understanding of careers associated with Mathematics and its value; provide a foundation for career orientation after high school; have a minimum capacity to self-learn about mathematical issues throughout life.

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