Math Problem Statement

The volume of a regular cylinder is 50πx⁹y⁷z³ cubic centimeters. The height of the cylinder is 2xy³z centimeters. What is the radius of the base of the cylinder? V = Bh

Solution

To solve the problem, let's extract the relevant information:

Given:

  1. Volume of the cylinder (V): 50πx9y7z350\pi x^9 y^7 z^3 cubic centimeters.
  2. Height of the cylinder (h): 2xy3z2xy^3z centimeters.
  3. Formula for the volume of a cylinder: V=BhV = B \cdot h, where BB is the area of the base.

We need to find the radius (r) of the base of the cylinder. The base area BB is the area of a circle, given by B=πr2B = \pi r^2.


Steps:

  1. Express the base area BB: B=Vh.B = \frac{V}{h}.

  2. Substitute the given values for VV and hh: B=50πx9y7z32xy3z.B = \frac{50\pi x^9 y^7 z^3}{2xy^3z}.

  3. Simplify the expression for BB:

    • Coefficient: 502=25\frac{50}{2} = 25,
    • x9÷x=x8x^9 \div x = x^8,
    • y7÷y3=y4y^7 \div y^3 = y^4,
    • z3÷z=z2z^3 \div z = z^2. B=25πx8y4z2.B = 25\pi x^8 y^4 z^2.
  4. Relate BB to the formula for the base area of a circle πr2\pi r^2: B=πr2    πr2=25πx8y4z2.B = \pi r^2 \implies \pi r^2 = 25\pi x^8 y^4 z^2.

  5. Solve for r2r^2: Divide both sides by π\pi: r2=25x8y4z2.r^2 = 25x^8 y^4 z^2.

  6. Solve for rr: Take the square root of both sides: r=25x8y4z2.r = \sqrt{25x^8 y^4 z^2}.

    Simplify:

    • 25=5\sqrt{25} = 5,
    • x8=x4\sqrt{x^8} = x^4,
    • y4=y2\sqrt{y^4} = y^2,
    • z2=z\sqrt{z^2} = z.

    r=5x4y2z.r = 5x^4 y^2 z.


Final Answer:

The radius of the base of the cylinder is: r=5x4y2zcm.r = 5x^4 y^2 z \, \text{cm}.


Would you like a detailed explanation of any step or further clarifications?


Related Questions:

  1. How do you calculate the surface area of a cylinder using its radius and height?
  2. If the height of the cylinder doubles, how does it affect the volume?
  3. What happens to the radius if the volume is halved but the height remains constant?
  4. How do the powers of variables affect the proportionality of the radius and height?
  5. Can this method be applied to non-cylindrical shapes with different formulas?

Tip:

Always ensure units are consistent throughout the calculation to avoid errors.

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Math Problem Analysis

Mathematical Concepts

Algebra
Geometry
Cylindrical Volume
Simplification of Variables

Formulas

Volume of a cylinder: V = Bh
Area of the base: B = πr²

Theorems

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Suitable Grade Level

Grades 9-11